Whether or not a person is biologically capable of giving birth has nothing to do with their sexual orientation. A healthy woman, regardless of her sexual orientation, can give birth. A man, whether he is gay or straight, cannot give birth.
yes
gay women give birth exactly the same way that straight women give birth. The baby passes out of the womb and through the birth canal.
Accept them for what and who they are, give them support when the need it.
You don't become a gay person. You are either born this way or develop this way as a small child. You can always pretend to be gay if you want though.
Lets look at your question one part at a time. Would a 100% gay man choose to marry a girl, I suspect not. Lets assume he did, can he give birth, definitely not, only a female can do that. Could he impregnate his wife, well yes, but only after sexual intercourse, and if he is 100% gay would he want to take part in such an act, I suspect not. In summary, its possible but unlikely.
i would tell my child if he/she want to be gay that's fine with me but if u don't want to be gay than u don't have to be gay if u don't want to
No. No gay person can do this. Sexual orientation is permanently fixed at a young age, possibly birth.
A person can't be asked WHY they're gay. Homosexuality is something that is not chosen at birth or a choice you can make during life, although an experience with homosexuality may give you a choice between hetero, and homosexuality. I hope this answer was of some use to you.
Gay Ribisi's birth name is Gay Landrum.
Inez Gay's birth name is Ynez Gay.
Sein Gay's birth name is Sein Gay.