I got some background on this MILF and she's into some crazy adrenaline junkie stuff like sky diving, snorkeling with sharks among other adventurous activities. I guess giving guys happy ending massages must seem pretty tame to her but she seems to really enjoy it. Maybe she considers it a good upper body workout or she gets a different kind of thrill watching guys shoot their loads. I bet she likes the stubborn ones for more of a challenge.