Posted: Apr 30, 2012 4:41 pm
Thomas Eshuis wrote: There are at least 2 candidates for C: lack of education regarding safe sex and cultural and societal repression.
There is one other factor, at the risk of being crude: The availability of one fewer orifice for the purpose of sexual activity in a male/male couple. This statistically increases the odd of the anus being used, but is simply a fact of anatomy, not a consequence of sexual orientation.