A man with dick cheese (smegma) fucking a girl on her period and giving her a cream pie.
Guy 1: " I just gave Sarah a Mustard & Mayo Cherry Pie, it was amazing"
Guy 2: "Me and Lin should try it sometime.."
When 3 lesbians get together and scissor and at least one of them has an STD/STI or at least a yeast infection Hence the "Cheese"
You hear about Carly, Alex, and Jenny? Those three had a Cheese and Mayo Sandwich. One of em has herpes and one of em has a yeast infection and Alix is a squirter