Since the chick came for an erotic massage, she expects to be whipped. Here she gets all the muscles and body prepared for intercourse, rubbed with oil for better gliding. And to thank the masseur with her mouth - it's cozily. Let her husband think she's at her girlfriend's house.
Well if you don't have anybody to have sex with, you can have fun with your sister in the 69 position, and they're pretty good at it.