He shrugged some. "Names are something other people give you, especially if they want to remember you. Calling you the same thing that everyone else calls you seems rather... impersonal." As if he were calling her by her rank, social security number, or some other cold arbitrary identifier.

"Besides, I suck with names anyway. It's easier to just make one up for you that I can be reminded of every time I see you, rather than having to flip through some massive mental rolodex." Because you really don't want to know how many women he's hit on over his lifetime. "Dollface and Sweetheart suit you both, anyway."