[Maximum Leader]

Or its neither genetics nor nurture. What if its caused by a virus?
http://blogs.law.harvard.edu/calebcrain/gaygerm

[capitan_refugio]

Thank you for the fascinating link. The authors make a provocative argument.

I tend to lean toward the psychological side, rather than the physical side of the issue. I think, in some cases at least, people become conditioned to enjoy that sort of behavior.