Kortney said:Incest should be illegal all around. I'm not liberal on this at all.
Few reasons:
1.Abusive parents/older siblings could manipulate their family members into sex. If you raise your daughter up drumming the concept into her, by the time she turns 16(or whatever the age of consent is in your country) it wouldn't be too hard to forge an abusive relationship. It would technically be "consensual" and it would be hard to prove otherwise. I think it would lead to some pretty bad stuff. You could argue that it happens anyway, but at least with incest being illegal there is no place for them to hide and justify what they are doing. How would you prove it is consensual sex? Merely making some guy's 18 year old daughter say "yeah, it's consensual" isn't enough. I'd be wanting thorough psychological profiling on all of the family. Why? See point number 3. Having the power of familial influence in a sexual relationship is dangerous. Whether someone thinks it is consensual or not.
2.I personally think it is wrong to be sexually attracted to a close family member. Incredibly sick.
3.It isn't a healthy mindset. I'd encourage anyone to find someone who wants to fuck their sister or their mum that isn't a total crackpot. I think those that do seem to invariably suffer from a mental illness or a personality disorder to begin with.
4.The obvious health risks of reproduction. How would you police this? Make only same-sex incest legal? What about heterosexual couples who are infertile - are they allowed to have intercourse then? Whatever the decision it - it's going to be lots of fun trying to police it.
I have no problem with taking the conservative side here, even if it is technically the minority. I think many members of this forum are way too socially left-wing anyway - the forum is filled with idealists. I think we can all agree on that.
Feel free to go mental and passive aggressively try to imply I'm an idiot. I don't really care. I don't expect more than 50% agreement on anything, nor do I seek it.

No, that's not sarcastic. This is the best argument I've heard on this thread.