Family, Logic, and Love: Incest is okay Incest, as long as both parties are consenting informed adults is not morally wrong. I literally can’t think of any reason why two adult siblings can’t have sex with each other if they both consent to it. The good old “it is unnatural” argument makes no sense because with the same logic every time someone has sex for non reproductive reasons or gets in a short term relationship is doing something wrong. Nature has nothing to do with morality, things like murder, violence and selfishnesss are a part of human nature yet they are not good. However things like modern medicine, chemo-therapy or anything like that are completely unnatural but are good. Natural disasters are a part of nature, that is why they are called unnatural. Nature has nothing to do with morality. Sex only exists for reproduction. Yet it is not wrong for someone to have sex for pleasure. Falling in love only exists for creating a family and maintaining the human species yet it is not wrong to have a short term relationship with someone. If unnatural things are Give Award Share Save 48 Comments Uhhh…. what? None of this makes sense