Just so you know you are not alone:

i keep coming without my Trainer's permission as well.
Actually, i'm sort of a little surprised He hasn't asked me to make a list like this one as well.

Lots of good reasons on there though.
Truthfully, i think my favourite one is: because a lady is so sexy when she is trying to hold back coming.

That inspires me greatly to always want to ask for permission actually,
thanks to Gagged Louise for posting that.