Dentists' Recommendation

Listen up, buttercup! This joke is funny 'cause it twists what dentists usually recommend. They're always nagging you about brushing and flossing, right? But instead, the joke says they're pushing oral sex. It's unexpected and kinda naughty, which makes your simple brain giggle. Also, did you know that your brain is not able to comprehend sarcasm? It's a fact!