This isnt the standard `flashing the pizza delivery guy` prank, no, this goes way further then that. This girl is trying to find out if she can get the pizza for free and what she has to do for that. She expected that offering her pussy for some finger work would do the trick and at first it seems to work. But this dude is a total asshole, after he had his finger in her hole he points to the invoice and makes clear she still has to pay for the pizza.