Only because you asked:
My inclinations are bisexual, but I made a choice to only pursue heterosexual relationships because I wanted the traditional nuclear family with biological children. Also at the time I made to he choice gay marriage was not yet legal. Being straight would just be easier. So, I did make a choice, but I do not believe for a second that means others do, because I cannot imagine that if they had the choice, they would choose to make things harder on themselves and have things be more complicated.