The experience my wife had with her fwb being fucked on her back was out of this world insane. After giving it to her so good on her back he stood her up and told her to bend the edge of the bed.
She promptly did as he requested and well.... I'll let you see for yourselves.
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 ...