I have no idea what that term means except for the half definition I see on Urban Dictionary at the top of a google search, but I have a pretty high level understanding of biology and evolution (as I'm a biologist professionally); I would hesitate to to describe myself as someone who misunderstands the biological nature of humans (as the UD definition says, but again, I've never heard the term). Relationships certainly involve both biological and sociological components, and separating the two is not entirely possible. But to deny that sex is inherently carnal is incorrect in every conceivable way. Anyway I don't entirely understand your comment, except that I get that it's derisive. If you care to expand, please do. Edit: The deleted term was "biotruth" for anyone else who wants to jump in and enlighten me.