The rates of sexually transmitted diseases are both growing and showing, thanks to hookup apps. Doctors have seen a resurgence of syphilis, gonorrhea and even HIV, because of the ease with which you can now bump uglies with strangers. These infections swipe left and right between bodies in the bed, so it's become increasingly important to get tested.

A billboard that just popped up in LA's West Hollywood neighborhood is raising awareness about these concerns. Tinder is pissed about it, and their piss burns:

Sources: LA Times