Penny: Oh, Zack, hi. You guys remember Zack?
Howard: Yeah, hey, buddy.
Zack: Hey, did you two get married?
Penny: We did.
Leonard: Yeah, mmm-hmm.
Zack: To each other?
Zack: Cool. 'cause other than when you broke up with him and dated me, then broke up with me, and then dated me one more time before going back to him, I was always rooting for you two.