I think searching for a complex lengthy explanation as to sexually stimulation to our exposed bodies or parts of our bodies in conjunction with medical treatments or solo would take us further away from reality.
Freedom and the feeling thereof is a very pleasing feeling. Shedding clothes, blanket, even coats gives us that. Nudism ,skinny dipping a naturist experience free us but also mentally ,and are compatible with our carnal side which is an expression our sexual needs and activities . All of us included in this cocktail . OUR left over animalistic traits . We often try to repress these traits just let them happen. Why do many seek out and enjoy the beckoning scent of her pussy ,anus??? Simple ,its part of our biological code and decoding. You can take us out of the wild or the barnyard, BUT YOU CAN'T TAKE THE BARNYARD AND THE WILD OUT OF US
Then there is fear and flight a limbic response that is meant to keep us safe. When choosing be present in situations of voluntary disrobing ia a perceived safe place you and /or a friend and may succumb to your past experience suddenly find yourself(s) locked in a session of deep passion. The best one sounds like an anomaly ,is adding an element of fear to a safe situation. Some of my BDSM friends do this exceptionally well. A person is safe maybe even restrained, no fear for themselves but fear what is about to befall them even thought they have done before. They welcome it ,it heightens their desire to receive. The response is clitfic. NOT AN ANOMALY BUT SOMETHING I WANT AGAIN.
this whole thing is simply about choosing to WATCH AND ENJOY, JUMP IN, SURRENDER AND JOIN IN, or TAKE CHARGE.
LET WHAT IS IN YOU CARNAL PERSONA COME OUT, THIS ALL FAMILIAR TO YOU, IF NOT IT WLL BE. Exercise your freedom ,put yourself where you want to be. BE A JOINER and don't chicken out. Say yes with someone you TRUST,enjoy it .