When a woman with longer labia lips rubs them against a guys anus.
I was banging this chick and she had me lay on my back and pull my legs to my chest. She said she was going to make a Greek Taco. She straddled my crotch and then pulled and rubbed her beef curtains all over my asshole making it wet with her pussy juices. She then tried to stick them into my ass with her fingers!!!