In the conservative perspective of being the self, sex is a tabu, while all try to hide everything that is connect with sex or desires, which can create some problems within the individuals that become unable to create a normal Relationship with woman and develop it into the level of sexuality and intimicy. Since that experience ask to have woman interactions, and in the Past, in almost all countries in the world, for several generations, sex separation was part of how schools were made, which did result in what always existed, which we call this days homosexuality.
A condition that can exist, just by the condition of opportunity. Schools with men only will have men/children who are awakeing to their sexuality and by that condition, if there is no woman around, they will try with men. And in this society we say that this child is homosexual but I think that is wrong, since it was the condition that lead to that "choice", that was not a choice, but the best opportunity to discover sex, which all living beings have.
Dogs can describe men. When they are open to sex, they will try with everything. Another male dog, another male or female Person(leg), with objects, with their own Tongue, making a self-Blowjob. Cats can describe woman. When they are open to sex, they will not try to force to have sex, but they will "open their time" to dedicate making you feel safe with her, to give you the opportunity to get close to them.
Masturbation is not a Sin. To Rape(force sex) any Living being, is.
Can you imagine a world where Woman pay to make sex with Men? That would be a interesting reality while is not what we know until this days. You see, what is part of intimicy, is part of a social activity that share something in a "correct" and consistent way, to make the other part feel safe and enjoyable to be what they are.