Ok, let's have a quick summary here:
1) There are some people who think that incest is wrong, full stop, not even when it involves consenting adults and is not for procreation.
2) There are some who think that what consenting adults do in private is nobody's business but their own.
On the first point I have not seen *any* reasonable proof or logical argument to back up *why* it is wrong, just circular arguments of "it's wrong because it's incest and incest is wrong" and "it disgusts me and lots of others" which, whilst emotive, is not exactly a reasonable argument.
On the second point I have seen reasoned arguments in favour this, yet I haven't seen anyone demonstrate *why* what consenting adults do (especially if not for procreation) should be the business of others.
Frankly I have no more interest in contributing to this thread because I enjoy having a reasonable debate but I'm not going to hang around to simply be abused for simply holding a "non-majority" viewpoint.