Quote from Robert in Peter on the Couch
Robert: Did you notice he was wearing my shirt? I guess he just went into the drawer and helped himself. Amy: Actually, I gave it to him. Robert: Ah! Amy: He needs something to wear while he rinses out his clothes. He only had the one outfit. Robert: Yeah, I noticed his underwear hanging on the doorknob, which reminds me... If you go out today, pick up a new doorknob. Amy: Oh, that's right. I also gave him a pair of your briefs. I had to pin them.