Most people who go to a pawnbroker do it because they need cash. Perhaps some people just wanna get rid of something and sell it, but a pawnshop isn't a good place for that. The idea is to get back the object, soon or later.
Someone thought that need of fast money made an excellent story for a porn video. Apart from more or less money, sex is used as another exchange currency.
"Do you want more money? Look, you could come and give me a blowjob..."