In the nicest possible way to say "I'm cool if we don't see each other again/ you're average/not that interesting" just make up some crazy impossible type shit that will turn him the fuck off but pretend you're really interested.
If he bites, set up a private meet at your place of selection.
Blackmail the guy
So then, "sounding" is like having a urinary catheter inserted into your urethra . . .right?
Anyone here ever had that done in a health-care setting? Gents? Ladies? Was it FUN?
3Sum: do a little research and think it over. If it is a go, try to get ahold of STERILE catheters from some where: maybe an understanding urologist. Then look into how to self catheterize your self the way some pazra pelgics do. The term I have heard used for using a shorter catheter without a tube and leg bag is "straight stick".
I knew a girl that would do this with her S.O. and try to have sex in that hole after sticking a thermometer in her. Lol I was like stick it in him and see if he likes it. She said she has, then I didn't care to know anymore. Maybe she wants to fuck you in your pee hole then be like thanks for that it was great and leaves lol.