Same here. English Literature class in my Junior year at Univ. of Pennsylvania. Why Thomas Wolfe has been on my brain all these years is beyond my understanding. Must have been on an unforgettable test.
I have belonged to several BDSM clubs in Philadelphia and NYC plus regular visits to the baths as well as on line hookups and fuck buddies, I would say the estimate is somewhere around 1500.
I have had that happen when I was younger. It came for wearing a cock ring that was too tight. The doctor told me it was from a blood vessel that ruptured due to the tightness. It never happened again. I stopped using a cock ring.