Quote from Ross in The One with the Apothecary Table
Ross: I still can't believe she hates Pottery Barn. Rachel: Ross, get over it. It's not like she hates you. Ross: Yeah, but Pottery Barn? You know what I think? She's just weird, you know. It's because she's a twin. Twins are weird. Rachel: Ross, she's not weird. She just likes her stuff to be one-of-a-kind. Ross: Huh. You know what's not one-of-a-kind? A twin!