I'm not a chap I'm afraid, but my Dad's had quite a few of these done and is very matter of fact about it (yes I know not many Dads would discuss this with a daughter but he tells me this sort of stuff so I can chat with the medics at work to see if what they say matches what his docs say) I think he gets an antibiotic shot every time as the first time he had it done it triggered an infection and he has a dodgy immune system, but I don't think that's standard as he has to remind the staff when he goes along.
Most medical procedures are a lot easier if you can relax as they're being done because your muscles will be more relaxed so the procedure itself will be mechanically easier. Remember that what is embarrassing and abnormal for you is workaday for them. If you have any fears or concerns tell the staff, they're not psychic, usually will have heard the worry before and have a ready answer.
Best of luck.