My wife and I are into mild bdsm as she feels too nervous to have her body completely tied up. Just her arms for now. She actually suggested it as a way to get over a fear she has and it turned into a regular thing for us.
Pay attention to her nipples in one of the pictures.
Each token is about 5-10 cents and you can tip 1 or as many as you like. Every token amount has an effect of some kind on the performers."
The tokens vibrates the toy remotely which is usually already inside the woman. So your 5 cents makes her shiver. After awhile, she does something extra (sexy) special ...