You’re quite correct. A lot of boy kids would’ve LOVED to have hairy palms! I know I definitely had a lot of fun scaring the girls!
In reality, of course, it was the clearing up of acne that caused sexual intercourse, which in turn led to the diminution of masturbation.
I have often wondered if in times when hygiene was less common, that handling ones genitalia more than required might make conjunctivitis and other eye infections more common?