Living with People (ie Your Flatmates)

So far, I've really enjoyed living in my flat. A little quiet (rather that than noisy party animals) and everyone is pretty friendly. But you know as the year progresses there are little pet peeves that creep up on you. And this one has to do with our communal kitchen.

So I've been trying to force myself to cook and break the habit of Sainsbury's microwave dinners. (I will prevail, don't worry!) So one day, I am thumbing through my silverware drawer and I notice my spatula is missing. Ashamedly, I only noticed then because I was looking in the drawer and hadn't noticed it because I needed to use it. So I ended up finding it in another drawer, cleaned but obviously used: hmmm....

So I kept on the look out and yesterday I came in to cook a microwave dinner (I swear lamb in a skillet is coming up, I promise!) It was quite the party as half my flat was in there, and I go into the drawer to get a fork, and I notice my spatula and knife are both missing. So I look around and I see that my knife and fork are in a dirty dish pile and I know who has been cooking right then....

I decide to wait and see what happens. The dirty dishes disappear and I go back to my drawer and sure enough, my knife and spatula aren't there. So I look in the drawer of a certain someone and they are there.I obvious take them back.

Now the question is what to do. They must known I am on to them, since I took the stuff back. But I don't want to be a douchebag and bring it up, yet at the same time, aren't they douchebags for not asking me for permission first? What am I going to say "Hey I saw you used my shit without asking me first" "Sorry! Can we use it now?" "Now that you asked, sure!" Yeah, a Catch-22. Any ideas anyone? (As you can see I don't have to deal with this stuff normally)