One of the best episodes was the one where it's a "what-if" episode where Ross is still married to Carol in a strained marriage, Monica is still fat, Chandler has quit his job to become a free-lance writer, Joey is still on Days of Our Lives, Phoebe works for Meryl-Lynch as a high-powered trader, and Rachel didn't walk out in her wedding during the pilot.
Funny, funny, episode.
Ross "to spice up their marriage" had a 3-way with Carol and friend of hers (Susan) the night before and is talking to Joey about it.
Ross: Joey, have you ever had a threesome?
Joey: ... Look, Ross, you're great and all and Carol is a beautiful woman but I dunno...
Ross: No. I sorta had one last night.
Joey: Really?! How was it?
Ross: Eh...
Joey: Eh? Did you do it right?
Ross: I'm not sure, it started off OK but the other one kept kicking me away.
Joey: But I bet you saw a lot of stuff.
Ross: Yeah, I saw a lot of stuff!
Joey: Got kind of bored, eh?
Ross: Yeah. I made a sandwich, though.
Joey: Really? What kind?
Ross: Roast beef.
Joey: Was it good?
Ross: It really was!