When a man ejaculates in/on a girlsface and she pulls away from the tip of the penis, occasionally, there is a string of semen from the the mans penis to her bottom lip/chin/eyelid/ear, etc. Thus...string cheese
"You should've seen the nut I busted on that girls face! There was string cheese everywhere!!"
The centre layer of an Oreo Cookie left several years past it's sell by date. Depending on where stored you can end up with it smelling a bit like cheese.
"I just moved in and found some really old Oreos on top of the fridge, they stank of Oreo Cheese though!"