Why do the questions dealing with sex seem to elicit the most answers and liveliest discussions?

Based on causal observation only, not upon statistical research, I’ve noticed in the short time I’ve been participating in the Fluther community, Flutherites seem to congregate more frequently in the realm of sexually-related questions.

By sexually-related, I mean everything and anything related to sex – from stereotypes, to relationships; from debating which type of news person is more appealing, to giving one’s entire energy to his/her S/O.

What is it about sex that keenly draws our interests, snarky comments, jokes, sharing of experiences, and quirky thoughts?