On the one hand, it doesn't seem like an ass would be able to lubricate like a vagina.
On the other hand, I think that in the gay world it is known to happen:
http://www.medhelp.org/posts/Urology..._answer_header
If i think about this, and try to let it happen, even if it doesn't actually, it really helps my session.
Anybody ever experience it?
Darwin