At the end of my junior year of college, I and
one of my roommates rented a truck to drive
ourselves and all our stuff back home in.

Somewhere on the way, probably in
Tennessee or Kentucky, we pulled into a rest
stop to take care of business. I only needed to
use the urinal, but my roommate ducked into
one of the stalls. I finished before him, went to
wash my hands, and then dried them with
paper towels. As a stupid joke, I grabbed an
extra paper towel, wadded it up into a ball, and
tossed it into the stall my buddy was in.

I heard a voice say "Thanks!" I chuckled to
myself, and walked out of the restroom...

... and saw my roommate in the lobby, waiting
for me.

Gri"not an opposite-gender restroom story, but
still amusing"shny