Incest

Someone on /b/ keeps claiming that we have genes that prevent us from being attacted to our siblings. How true is this? I for example find my sister extremely hot. I masturbate to her pictures all the time and would fuck her without a though given the chance.

>>28
no you wouldn't, my sistaer is hawt, apparently and i can't even think of fucking her, such thoughts are like thinking about eating iron. You can think about it, but not conceive it or enjoy imagining it.

I didn't read it from wikipedia actually.