This is a ass/toilet fetish custom. In this video, the MILF is waiting for the young neighbor guy to show up at her place, so he can see her looking all pretty in her sexy bikini. She realizes that she hasn't taken a shower and she has been sweating all day long. But the neighbor boy ends up admitting how much he loves her scent and her sweat. This makes her turn around and give him some more whiffs of her musky buttcrack and her butthole. Then she continues to twerk for him and eventually make the neighbor cum for her.