I'll Give You Four Guesses.

Male coworker #1, walking up to soda machine: Yippee, a free soda!
Female coworker: That's good karma.
Male coworker #1: Yeah, I earned this! Whoever lost this did some bad things.
(walks out smiling with two sodas)
Male coworker #2, entering: Hey! Who took my drink? I left it while I went to the bathroom.
Female coworker: What were you doing in the bathroom?

San Diego, California