Is sex a "want" or a "need"?
mekekelo The health (both physical and mental) benefits are scientifically proven.
I think scientific fashion changes over time. Currently, positive aspects of masturbation are stressed, but the negatives (like compulsion, soreness/oedema, loss of time and social life etc) are still there.
A doctor will say there is nothing wrong with masturbation ...up to the point where it starts to interfere with yours or someone else's life.
Vanessa We can consider it,needed to have a better health.
We've discussed this before, so all I'll say for sure is that my own health and happiness were increased greatly when I quit masturbation (or, more accurately, when I allowed myself to be prevented from it). I understand you have different view and experience and totally respect that.
Angelina advantages yes, i think so too but does that make it a need?
I think to the extent that sex brings us closer to others and serves to continue the species, it's definitely a need.
Masturbation, however, is by definition, a solitary activity. It's not needed at all and can go against getting out there, forming relationships, and living life!! 
That's what I found. Of course other people have other experiences and I respect this too.
Jonas Do people actually need to masturbate?
Here's a question:
If I feel horny is it better for me to go interact with my wife (in any way, doesn't have to be sexual) or for me to boot up porn and keep to myself until late at night?
An awful lot of people in the world are doing the latter! Is this healthy?
Jonas Surely no-one ever died from lack of orgasms?
Currently I am testing this theory... 
Gnaws own leg off through sexual frustration 
Vanessa We can consider it,needed to have a better health.
if health is the first priority i agree with you
Jonas A doctor will say there is nothing wrong with masturbation ...up to the point where it starts to interfere with yours or someone else's life.
exactly and i agree with you science is an ongoing process
Jonas Gnaws own leg off through sexual frustration
does not work because of my thighbands 
Jonas I think scientific fashion changes over time. Currently, positive aspects of masturbation are stressed, but the negatives (like compulsion, soreness/oedema, loss of time and social life etc) are still there.
A doctor will say there is nothing wrong with masturbation ...up to the point where it starts to interfere with yours or someone else's life.
Only happens if it is excessive.
Jonas We've discussed this before, so all I'll say for sure is that my own health and happiness were increased greatly when I quit masturbation (or, more accurately, when I allowed myself to be prevented from it)
Psychologically/emotionally,I can understand it;but physically,it is not what the scientists tell.
Jonas Masturbation, however, is by definition, a solitary activity. It's not needed at all and can go against getting out there, forming relationships, and living life!!
If done in a reasonable amount,it can help when single and help to know our body better.And it is often considered good,even if in relationship,nowadays.
Jonas Is this healthy?
Depends of the mood of your wife.
Jonas Currently I am testing this theory...
Why not have some with your girlfriend?
Angelina if health is the first priority i agree with you
Health is rarely used as a reason for doing it,but it is a good side-effect.
Vanessa Psychologically/emotionally,I can understand it;but physically,it is not what the scientists tell.
But psychology is also a science 
Jonas We have very different opinions and this is probably the result of our very different experiences with chastity. For you it's an unwelcome limit, for me a personal choice that freed me from masturbation.
i think at the psychological point the differences between volunteers and involuntaries are very big
Jonas We have very different opinions and this is probably the result of our very different experiences with chastity.
I think so,yes.
Angelina But psychology is also a science
But I don't know well if there is studies about psychological impact of a chastity belt for a willingly man(for a serious user,not a fetishist)...
Angelina i think at the psychological point the differences between volunteers and involuntaries are very big
Probably,and logical.
I agree,but it's not the case for many of us...
I randomly find this topic.
Sex is at the base of Maslow pyramid. While this as been criticised, in the author intention is definitively there. It’s a basic need. Sometime you will not see in the diagram, but it’s basically there
Also interesting to see that while sex is among physiological needs (with food and sleep), love, intimacy, are on the third level, so higher, where needs there are needs for belong.
Here is a good description
https://www.simplypsychology.org/maslow.html
Milord
While that pyramid theory is well established, it is by far not universally accepted.
And your claim that sex is the foundation is not correct. It is actually procreation that is underlying everything. Sex is just the most common concept. But if you read for examply 'Brave new world', you will realise that other models or society structures are by far not as unthinkable as might consider today.
Milord Sex is at the base of Maslow pyramid. While this as been criticised, in the author intention is definitively there. It’s a basic need. Sometime you will not see in the diagram, but it’s basically there
Also interesting to see that while sex is among physiological needs (with food and sleep), love, intimacy, are on the third level, so higher, where needs there are needs for belong.
From that same article:
Regarding the structure of his hierarchy, Maslow (1987) proposed that the order in the hierarchy “is not nearly as rigid” (p. 68) as he may have implied in his earlier description.
Maslow noted that the order of needs might be flexible based on external circumstances or individual differences. For example, he notes that for some individuals, the need for self-esteem is more important than the need for love. For others, the need for creative fulfillment may supersede even the most basic needs.
I would say sex in particular is one of those needs that is rather physiological in nature, but not important for the survival of the individual the way food, drink or shelter are. For the species, sure, sex matters as the vehicle of reproduction, which is why most humans experience a certain urge to engage in sexuality when they are equipped to meet the basic needs for potential offspring. But also, sexuality often serves as a supplement to love and intimacy for many, and a lot of people had a very good experience living fulfilled lives with minimal physiological sex.
Brave new world describe a dystopy, as, for example, 1984 does. And its fiction, not for real. Also a strong criticism against Huxley current society.
I'm talking about maslow theory, not an universal claim. But i will not consider any fictional product as a model for an alternative society
youdontknowme But also, sexuality often serves as a supplement to love and intimacy for many, and a lot of people had a very good experience living fulfilled lives with minimal physiological sex.
I have to say that I don't share your experiences about being "a lot of people", but I know that they exist, and of course they rightful can have wonderful life without sex.
But Maslow refer to normal (statistically speaking) human, and for him sex is a phisiological need.
Marlow sustain this. I'm just explaining his theory. I also explained that this particolar idea has been critized by his future peers
Milord Terms like "a lot" are of course open to interpretation. I should have been more specific - I did not want to claim that it was a majority, or even a significant fraction of people - just that there are more people like that than just a few that are easily dismissed as freak accidents. Of course the majority of people who live fulfilled lives have their physiological need for sex met in some way. Even among asexuals who do not seek out sexual partners, many, but not all, enjoy the occasional relief through masturbation or whatever other mechanism. Many people in the kink community who engage in very long chastity lockups (several months up to multiple years of denying all genital stimulation) still take pleasure from other erogenous zones. And I do not believe that all monks completely cease masturbation when they make their vows. Many might, but others probably just feel more guilty about it than the average person.
Still, there are people who suffer from anorgasmia or genital damage or whatever and thus do not enjoy sex on a physiological level, or who genuinely live without sexual stimulation for extended periods of time and feel happy with that. Maslow acknowledges that when he says the hierarchy is not as rigid as it is sometimes perceived to be.