Hookers vs Porn Stars

What do hookers and porn stars have in common? They get paid for sex and get STD's.

Explanation

Explain Bear

Alright listen up, buttercup. This joke points out the 'similarities' between hookers and porn stars. Both get paid for the nasty, and both got a high risk of catching the clap. It's funny because it's true, and you're probably gonna catch something too if you keep licking doorknobs.