Friends [Season 3, Episode 8]

— So you need a dentist? I've got a good one.
— Thanks. I have a good one too. I just can't see him.
— See, that is the problem with invisible dentists.

— You wanna get her something special? Get her flowers. Get her candy. Get her gum. Girls love gum.
— That's a good idea. "Dear Janice: Have a Hubba-Bubba birthday."

— Hey, Ross? I got a science question. If the Homo sapiens were, in fact, "homo" sapiens... is that why they're extinct?
— Joey, Homo sapiens are people.
— Hey, I'm not judging.

— Come on, you didn't kill anybody. These people just happened to die when you went to the dentist. It's just a coincidence.
— Tell that to them. Oh, you can't! They're dead!

— I'd like to get her something serious.
— Oh, you want something serious. You know what you should do? You should get her one of those, um... barium enemas. Those are dead serious.

The way I feel about you... it's like I finally understand... what Lionel Richie's been singing about.