I have a worn out dark blue t-shirt I keep in the car to ejaculate onto and wipe my dick. The cum stains are very evident with all the times I've cum that going into the washing machine makes it clean, but the stains are there, only reduced slightly. I have worn it in public and everyone's so into their phones or not paying attention, they don't understand they're looking at a sexually explicit, XXX-rated t-shirt!
I do too when my dick's really driving me crazy, like the man at 11:20-13:40. I'll get my pants/underwear down (legs apart), but not to the point of being nude. Also a cum rag so I avoid his mess here in his pubic hair. In my case my stomach and upper chest hair as well.