I tried it once. I ended up on the operating table because of a prostate injury. No pre-cum or semen flow since. Semen now routed through the bladder on climax. Drains with urination. That can be a dangerous stunt, as I found out. Think twice before you try it!!!!
See, I would like to witness that, but I don't think I would participate; who knows thoughI have enjoyed sounding several times. Have a friend with several instruments that are kept perfectly sterile and he and I have shared one from both ends until our cocks met. Totally HOT. Must be careful and clean but orgasm is fantastic.
I bet that guy loves being catheterized. The nurses where I work would have a lot of fun with him.