- Edited
Andrew I have a question for people who see masturbation as inappropriate behavior
I certainly see masturbation as wrong. ...for me. Other people can make up their own minds as to whether it is right or wrong for them and this can change over the course of their lives.
- why do you think so if the mainstream of modern medicine and psychology see it as a normal (healthy) form of sexual expression?
Modern medicine and psychology adds the caveat that masturbation is a problem if it becomes distressing to the masturbator. Further, society only accepts masturbation is normal if it's done in secret.
The NoFAP movement and the widespread availability of hardcore porn has had a effect on modern medical opinion. There is a noticeable push-back on the relaxed, liberal, sexual views of the 60s onwards.
I'm omitting compulsive masturbation here, which disrupts the functioning of a person.
This omission means I can't really answer any more, because I see masturbation as a short-circuit of the body's reward systems that can end up disrupting a person's functioning and wasting vast amounts of their time. A rabbit-hole.
I address this question especially to people whose motivation in this matter is non-religious.
If you substitute the words "danger" for "sin" and "good" for "god" then religious texts become more readable to the non-religious pov.