They were all answered, dummy., Would you like to see them all again?
Oh look. you once again make a claim that you couldn't support if you tried.
Maybe ask your babysitter to help you out before you make any more stupid claims.
A question that has no relevance to your theory that people choose their sexual orientation, but (a direct answer to one of your dumbest questions yet): NO ONE chooses what organs they are born with, or without (which actually happens).
A direct answer to your question: The rolE you play in reproduction depends on if you are born with the ability to produce sperm, and further with the ability to get that sperm all the way to the female ovum.
If you are born without the capability to fertilize that ovum, then you play no rolE in reproduction.
A direct answer to your question: YES, any action you personally take is by choice, whether it is to have sex with a woman or a man, or both or neither. Action is not orientation. You have said that orientation is a choice.
You can't even fail well.