I think your hand gives off a heady and slightly tangy aroma with a musky undertone, which could be likened to a pound of mincemeat which has been marinaded in Dr Pepper, and left to dry in a poorly ventilated airing cupboard.
Beef and onion can smell quite foul, but thats a fairly uncommon alliance in the sandwich world...UNLESS you're talking "Steakwich". Hmmm *strokes chin thoughtfully*