Some providers are the type to just show you their vagina and allow repeated insertion until your banana juice leaks out.
Others know exactly what to say to bring out the most during a session. A recent thread reminded me of what one provider said to me. After asking her about rules, she responded by saying, "You can do anything you fucking want to me!"
It was more the look she gave when she said it then the actual content of the line that drove me nuts. It was akin to providing a full moon for a werewolf. That was some incredible sex.
Certain lines can also ruin a session as well. Once I was defiled with, "Rape me Daddy with your big dick!" Failure. Yeah... no.... on so many levels.
So what have you heard good or bad during a session?