The Good Samaritan

There have been times, during my loooooong career as a single woman, that I have met ordinary guys who offer me extraordinary propositions. One such exchange:
"I don't want to have sex, I just want to give you pleasure. Let me go down on you, no strings attached, nothing required in return."
Upon my quizzical, eyebrows-raised-to-the-ceiling response:
"I just enjoy making women happy. What can I say, I'm a giver."
Folks, I must admit I have never taken them up on it, cute boy scouts as they are. Call me a cynic, but there has to be a catch. I'd imagine as I'm lying there, gasping for breath after my seventeenth orgasm, he'd suddenly emerge from between my legs, horns sprouting from his head and fire shooting out of his eyes--"HA HA HA! NOW I OWN YOUR SOUL!!!!"
--Or something like that.