I guess if conservatives believe that homosexuality is a choice, then it must also be true that heterosexuality is a choice. So any man who is attracted to women must also be attracted to men. If he is heterosexual, he just chooses to seek out only women, and if he is homosexual, he chooses to seek out only men. Seems logical to me!
Personally, I’ve always been a bit annoyed that I am heterosexual, and not bisexual. So many attractive people out there, but I’m somehow limited to only half of them!