I saw some porn one time where some woman was working a carnival stand or maybe trying to sell lemonade (something like that) and had her elbows/hands on the counter and was trying to talk/sell these things to people as she was getting banged from behind (her butt was outside covered by a sheet or fabric).
It was extremely hot watching her try to sell these things to people, and finally at the end just said fuck it, and completely lost herself to the moment. One of my favorite prons ever.