BI sounds like there's a real love connection here - did you hint at another date w/ her, or did she give you the "I really like you as a friend" brush off as she was wiping her mouth and removing her sponge?
If there is a second date I think you should use the opportunity to kick off the new "Mall Brats" line; do some pre-scene banter into the camera outside the place, then go in where lil' PW is pretending to be shopping, do the fake pick-up and then cut to the makeshift mall store set for the fluid exchange.
Yes gimmicks are silly, but hey, if the bang bus and pizza delivery boy sites of the world are making money on theirs, why not. Most guys have been to a mall and had a chest-clutching moment when some genetic miracle walked by.