the one with the prom video
phoebe: hang in there, it's gonna happen.
ross: how do you know?
phoebe: because she's your lobster.
phoebe: you guys, it's a known fact. lobsters fall in love and mate for life. you know you can actually see old lobster couples, walking around their tank, you know, holding claws.
phoebe: see! he's her lobster!