For me, the first time my daughter wanted to have sex would be the mental crisis. Puberty and the anatomical changes I understand, the emotional changes and rebellion are more challenging to adjust too.
Einstein, "science without religion is lame, religion without science is blind."
Often for prisoners as well, there is no attraction, just the behavior cause again they're desperate to relieve urges to screw *something* Many people can manage sex with a person they're not attracted to at all, just having the mind wander.
I lucked out, my daughter was going through a discovery of Christianity at the time and boldly commanded to me that she was not having sex until she was married. Smart dad I was, I took the opposite argument, guaranteeing she would stay her course. Gotta love the predictability of teenagers.