When you try and make yourself cum to pass the time and they have to intervene >_<
Haha I have the opposite, I'll begin to touch myself in the hope of getting them more aroused and likely to cum quicker then they'll stop and say "oh are you going to make yourself cum"
Aaaahhhh no! So I'll just fake it, which hopefully has a similar outcome.
Never ceases to amaze me why they think we care about having an orgasm ourselves, the money is the end game not our own pleasure.