Comment: There is the issue of a warped society, and the issue of biology

Biology creates humans with ambiguous genitalia, so I assume there are people with ambiguous sexuality also. How that makes me a "liberal evolutionist" is quite a leap, it makes me a retired medical professional who understands biology. Any male and female have a chance at mating and creating a child with ambiguous genitalia.
Glorifying sexuality is unhealthy. Good sex is great, but it is for 2. The society that glorifies sex above all else will glorify all manner of sex. Old fossil that I am, I remember getting "mixed messages" when I was dating, I heard was how all the guys want to watch 2 girls make out. It was no big deal to me, but it was pretty subtle back then, just a "joke." Well, look where we are now. This society has most people all screwed up about sex and love, but that is no reason to add "sin" to people for being what their Creator made them.