Devil's advocacy

ABC: "Are you going to marry her?"
XYZ: "I'll marry her tomorrow if that's what she wants."
ABC: "Why tomorrow and not today?"
XYZ: "It's Saturday and i don't bathe on Saturdays."
ABC: "How convenient!"
XYZ: "No, really. I'd marry her tomorrow if that's what she wants."
ABC: "OK. And what do you want?"
XYZ: "Her."