Bestiality, incest, and under-age sex involve animal cruely, child abuse and statutory rape. They have nothing in common with two consenting adults of the same sex having a relationship. It is juvenile to compare that to the three things mentioned above. Those things do hurt people. Same-sex relationships don't.
BS! Animals are property, if cruelty was really your crusade then you should also be lobbying against them being delicious food. I’m betting you’re either a PETA person or a hypocrite…which is it? BTW you’re welcome to prove that animals don’t enjoy having “sex” with humans, that might be interesting.
Child abuse only if they didn’t consent and guess what, plenty of 13 year olds have the mental capacity to consent…only arbitrary law prevents them. And what is the basis of arbitrary law??? MORAL JUDGEMENT!
Statutory rape doesn’t apply to consenting adult relatives so save your “moral outrage” for someone who cares. But given your logic, “Those things do hurt people. Same-sex relationships don't” then two adult brothers must be OK by YOU! Right?