I take exception to your premise that we should accept these choices of 'lifestyle' as normal. They are not.
which ones are you referring to? I don't think homosexuality is in the "norm", but I don't see it as a big problem. I've come to believe it is at least part a physical condition. And I don't understand why people have such heartburn over it. Who is it hurting? As for incest, rape, and the other things that some people try to lump in with homosexuality, I feel very strongly that those things are wrong.