My first wife was developing into an enthusiastic exhibitionist, but feared flashing men in public too near to home. One day we discovered that local free New-Age newspaper listed gobs of ads offering massages. (Our town was a super-liberal college town, with massage and acupuncture schools.) Some of the male masseuses even offered free massages to women. It was a great way for my wife not only to be fully naked but fondled by another man—all in the comfort of our home, with me there to ensure her safety.
One day she lamented that the masseuse wasn't also naked with her. I told to ask the potential masseuse on the phone if he was willing to be also nude so she could feel more at ease by not being the only one naked; if he said, no, then call another one. Almost half said yes, especially the young guys who were taking massage classes. Sadly, this was during our no extramarital sex period. Still, it was very hot to see the masseuse pop an erection while rubbing my wife's breasts and ass cheeks.