Freak her out
If it was me, I'd sit with a mouth full of the stuff (secretly) and when she smirks "oooh, who's been eating the su-"

That would be when I would lock eyes with her and slowly open my mouth, allowing sugar to run from it, while groping at my neck, rolling about in my chair, making tortured noises.
(oneltrchardonnay, Tue 6 May 2008, 19:15, Reply)