This really isn't a worst ever massage, but more the situation ... years ago, before the internet was real popular, I was looking for a massage in the local bar rag. Saw an ad for someone that was traveling and in town. Got in touch and set a meeting up. Show up at the hotel and when I get in the room I was surprised to find he actually had a massage table set up in the small room, it was wedged in there somehow and made the tight space even tighter. The massage itself wasn't bad. He then asked me to turn over and that's when it happened. He let out a small shriek, ran to the bathroom and closed the door. Between small muffled girly shrieks and "oh no"s and "oh God"s ... he tells me to get dressed and get out, go away. I wasn't sure what was wrong, so I asked him through the closed door, "hey, what's wrong?" and the reply was like "that thing in your dick ... get out". I guess he'd never seen a frenum piercing before, but I would have assumed as someone doing massage, he would have, I mean, even in the 90s I knew a number of guys with at least PAs.
Anyway, I got dressed and left. And for a while after that, I was self conscious about it and warned the masseur before I took my clothes off.