Here's a problem: Over 90% of human males masturbate. Absolutely, 100% of human males have a variety of sexual urges (some evil, most not). Arguing that acting out on those urges is a sin can be reasonable or unreasonable (depending on the nature of the demand). Arguing that HAVING these urges is a sin is going to cause giant, horrible problems.
If you try and teach male children that having any kind of sexual desires at age 14-18 is a sin (not actually acting on them, but HAVING them) and that masturbation is sinful, you're not going to end up with boys who don't masturbate, you're going to end up with boys who have guilt trips about it.