Oh, speaking of the whole Muslim-tattoo talk that AnonygooseD, that reminded me of something else, henna tattoos.
While I guess they're culturally used on women more often than men, I get them sometimes, cause they can look pretty damn badass if used correctly. For those who don't know, henna's basically a putty like material that's made from a plant iirc with a special dye. When the putty/paste is left on skin for a while, it leaves a mark, usually reddish in color. It lasts for a while, depending on the quality of the henna, and it's perfect for temporary fun. Don't be like me, though, and henna-tat your name on your hand.