Through example, acceptance, and direction in a closely regulated environment.
It is really elementary ...

If a male is never taught he can stand up and piss throughout childhood and that's all he sees, it will not be easy for him as an adult....it will be the preference to sit and piss.
Originally Posted by LexusLover
I have a handful of gay friends but I have many bi-sexual woman friends. They are not gay. They have been taught how to give/receive sexual pleasure to/from other women. They have been taught by example, but that does not make them gay by any stretch of the imagination. They are also accepted. Likewise, a man can be taught how to sexually gratify another male. But that does not make him gay. It is simply a learned sex act done for sexual gratification.
A person who grows up Catholic can move from that religion to others, or to none. My son was an altar boy who is now non-religious. I was a Conservative most of my life and now am considered Liberal. We are talking learned behavior. Being gay, IMHO, is not learned.