In all honesty, most will allow it because it wastes time. That’s it, not because they enjoy it or are into it. If you think they do, they’re just good actresses. They see how many guys a day and somehow each guy says that she had an O. One girl that I saw outside of normal hours even said, if they said they came, it’s more likely that you’re not good at it. Basically they want you to stop. The other reason is time left in the session and they want to make sure you finish on time.
I go down there from time to time but more to... well to just get the full experience. I do try and make sure the session isn’t bad for them, rough, or anything like that but 99% of the time you’re not not getting them off. Sorry but these girls have sex way to often AND need to protect themselves.