Cosmetics work fine on TPE sex dolls, even lipsticks. Buy a $2 odorless mineral oil at the hardware store. It can remove tpe or even clothing stains, but don't expect this. I pierced my TPE doll ear. Then I finally pulled a bit in her ear. Not sure if the two are relevant, but it may be. Wear during the game may be a good idea. As for the tattoo, I tried a temporary tattoo of silicone and tpe. It does not seem to be very well bonded and almost immediately becomes cracked and peeled off. Maybe there are some tricks I don't know, or I need a temporary tattoo with better quality. If you are an artist, you might draw a tattoo with a permanent mark and then occasionally touch it. My guess is that piercing a TPE sex doll is a good thing. But you must be very careful not to grab anything.