Are you male or female? (edit: aha, boy he is wubwubwub)
If she's able to come from penetration it's due to her physiology, not yours.
Or at least that's what I've heard. However if your cock vibrates and curves towards you at the tip then it's probably you.
(
Captain Wow If I show you the roses, will you follow?, Thu 1 May 2008, 17:50,
archived)