Had mine done over 30 years ago now. Went straight from work, nurse asked me to undress "No, just your pants and boxers". Sat, perched on the couch, legs dangling, still wearing jacket and tie while nurse swapped my nuts. I did think her grip on my dick was slightly firmer than it needed to be.
Driving home, started to feel a little uncomfortable so undid trouser belt, then unzipped fly. Stopped at some lights and a lorry pulled up alongside. Caught the driver looking down on me, sat there with my knob on display. I gave him the snip sign, he just winced.