Thankfully our clinics 'production room' has an entrance just outside the main door to the clinic with a sliding door going into the back of the clinic so DH just leaves the sample on the ledge and rings a bell then departs the room. He doesn't have to go back in to the waiting room.

My DP finds this process really embarrasing and it's a bit of a trial for us - usually he doesn't want to discuss it, so I'm very thankful that he doesn't have to take a paper bag past lots of strangers.