I am going to back up a bit and bring some perspective to how a lot of this behavior came about.
I have always been a bit of an exhibitionist. It really became a part of my life when I met and became engaged to a real free spirit girl named Kathleen, in the mid 1980's. It was the end of the 'free love' era and I was dating this flower child, who never gave up that free spirit lifestyle.
Katie, as we all knew her, would never wear a bra to hold / cover her 34 'C' breasts. She would disguise her nipple erections with band-aides stretched across the areola. Wearing peasant style blouses, which would indeed blouse out when she bent over, and she knew the 'show' she was putting on for those who wanted to watch.
Over Labor Day weekend, I invited my old College roommate and his then girlfriend, also known as Cathleen (Cathy from here on) to dinner at my apartment. After a bottle of scotch and several six packs of beer, I guess Paul had had one too many quick views down Katie's blouse, and, as she sat across the room from him, he drunkenly verbalized how nice it would be to see her breasts, live and for a long duration. Katie obliged him by lifting her blouse clear off her body, allowing her long hair to drop over her chest. Paul was disappointed that his 'view' was incomplete, so I went over to Katie's back and with two hands slowly gathered her long hair, lifting her hair from her chest and held it tightly behind her head. I then pulled it all down, gently, pulling her head back and causing her to thrust her chest out and at Paul. My free hand went to her nipples and I pinched each one causing Katie to shiver with delight and laughter. Paul was now hosting a very large erection and it was very obvious.
At this point he, again in a drunken state, said, "Well if you have gone this far why not take it all off".
To which Katie did, indeed, stand up and dropped her jeans (no panties on, mind you). She sported a well groomed light brown bush which when back-lite, revealed a very delicate slit... no outer labia or other fleshy parts. She then sat down and began to flash Paul as his he squirmed with his confined erection.
Not to be outdone, I wasted no time in completely dis-robing and joined my girlfriend in total nakedness.
Paul was moments away from doing the same, as his girl, Cathy, starred on in total disbelief at watching two naked men and a naked female in close proximity to her. And she was still clothed!