Some guys take advantage of "natural endings" Those natural endings can and do go beyond what is fair for the compensated time. Look, if the lady has some communication skills, there is no need to pole vault off the bed and say, okay, get out.

There are nicer ways and if the guy is a gentleman he will act accordingly and not put her in a position where she has to mention that he is a time vampire and hit the bricks.

A ten minute chat after the time that has been paid for has come and gone is fine, but to expect more action after that time, is rude.