it's funny how they do that...cats.
my neighbours cat has a bit of a thing for me cos I give it pretty cool snacks....and then every so often I find a bit of dismembered bird or mouse at my door. I thought it was pissed off at me or something but it's more like an "I like you alot" kinda symbolic thing.

...I wonder if you could do that after a date or something?...leave like half a sheep in the womans front yard the next day...

she might go..."oh yeah! this guy's a keeper!"