DR, thanks for this thread....the scientific / medical explanation (ie: neurochemicals, etc) makes perfect sense to me now (and has to be applicable to males as well). My nips have especially sensitive since my twenties and have gotten moreso these four-decades hence.
Any kind of licking, sucking, flick-touch prior to sex gets me going....
.and during drives me totally bonkers. If my partner is in tune with me and is pushing the right buttons, she can push me to orgasms that rival a fire hydrant fully opened.
Lastly.....damn, sexytinykitten.....what a hottttt effin' showcase, babe. I gotta figure out a way to get over to FLA some day