Today is my birthday, and a co-worker brought me a small cake. I figured I'd share with my fellow administrative assistants, so we'd cut the cake and had put the lid back on, and it was on my desk.
A professor wandered through our office, said "Oh, hey, cake!", lifted the lid, cut two huge pieces and said "I'm not going to eat it, but I'll take my kids some.." and walked off.
We were all kind of speechless about it. This professor always does stuff like that. She will take half of a leftover pizza for her kids, big chunks of cake, cookies, and so on, all without asking or being invited to take any.
Well, it's all your fault!
Everyone knows you keep food UNDER the desk, not on top of it! Or in a file cabinet. Or in the store room where professors never go.
Seriously I think I'd have pushed her hand away and said "No, this is MY birthday cake! It's a gift to me and I'm going to take the rest home and eat it myself!"
Would it have been impolite to stop her (or stop her during future incidents) and say, "Hey, is this for you because it's really only for the people in this office?" or to say, "Oh, this is just for Coworker1 and Coworker2 and me; we pooled our money to buy ourselves a pizza today."
A bunch of coworkers, two years ago, decided we needed a bottled water dispenser in our office. Anyone in the office could participate but have to pay a monthly cost. One of them twice caught residents (who work in another office down the hall but have the key to our office) taking water from the dispenser and told them, "You can't have this; it's paid for by the people in this office" (I assume no one else has been caught but since the residents also work weekends, they might be sneaking in when our office is closed and helping themselves). Another time, one of those same residents, when one of the supervisors was working over the weekend and had gotten a pizza for himself and another supervisor, walked right up to the pizza (in front of the first supervisor), took a piece then said, "Hey, GirlfriendResident is also working this weekend; may I take her some?" FirstSupervisor was peeved and said, "First, no; secondly, that pizza is specifically for SecondSupervisor and me, for which you didn't ask, so you owe me ______ next time around" (FirstSupervisor isn't afraid to speak his mind often). Resident was a little shocked (he had a few entitlement issues during his residency but now, as a regular employee, I think he's gotten off his high horse and become a normal person).