Plastic Hearts Puns

So I'm a cashier and I've heard nearly every tired joke that customers say to get a laugh out of me. To be honest, they usually only get a pity chuckle and a half-hearted smile. But this guy... he was one Funny Old Dude

This guy and his wife walk up to my register to check out. They look like they could be older than my grandparents. Him, his wife and I were just make cordial small talk, when my coworker who was a bagger today walks up.

>>Bagger: "Would you like paper or plastic today, sir?"

>>FunnyOldDude: "What was that, son?"

>>B: "Paper or plastic today?"

>>FOD: "What ever you want, man. I'm bi-sack-ual."

I busted out laughing. I never expected to hear that! And definitely not from this old white guy!