I have a couple tats (no i don't and won't show them, too identifying) and I have kind of a strange reaction to pain. I tend to laugh or kinda giggle when certain types of pain hit me. The tattoo needle was one of them. But another strange relaction I didn't expect was arousal. Some combination of the tingling pain, a strangers hands touching my skin, and adrenaline did it. I realized I was starting to have naughty thoughts run through my head as he worked. And I got wet. Since its led to this being a fantasy of mine.