Ines I think there much more implications that make advisable to protect a girl than a boy.
Which ones? I tend to disagter there. There are a lot of boys who get raped by a pedophile psychopath. As well, as there are a lot of girls who get raped at an a bit older age.
When you get a gf it's nice to know she's a virign. But if you're a girl - wouldn't you like to know that the saussage you "eat" has not "taken a bath" jet?
I mean ok, usually only girls get pregnant (yes, there also are transvestide males) but if you made a girl pregnant also your own life does chsnge, becaude you will have to pay a lot for it and might not even see your son/daughter, except for the weekends sometimes.