So false. BTW, I think a distinction needs to be made between choosing to live a homosexual lifestyle/labeling yourself homosexual and actually being homosexual. The first two are a choice, but being homosexual isn't. A gay man or lesbian woman may choose to live "straight" and date, marry and have *** with the opposite ***, but that doesn't make them straight. They still like the same *** and don't like the opposite ***, but chose to live according to the norms due to social and religious reasons possibly. Sounds like a horrible life to me, though.
False. I'm bisexual and was attracted to bodies of both men and women and also fell in love with both before I even knew that homosexuality/bisexuality are a thing. I absolutely wasn't exposed to it during childhood, I wasn't raped nor any traumatic incident happened to me and I definitely didn't make such choice early without having realized it (how does that even make sense?)
According to your logic, homosexual people wouldn't exist, because originally, there would be no homosexuals to "teach" their children to be gay and lesbian. And humans aren't the only animal species with members other than heterosexual. Do pigs, horses, dogs or cats also teach their young to be gay?