People who wash their hands before using the toilet but not after.
One of my most biggest peeves is people who wash their hands before using the toilet (be it man or woman, or man for the urianel)but not afterwards. I mean EWWWW!! Just because you used soap to wash your hands before but not after does not mean your DAMN HANDS ARE CLEAN!! then once their finished they touch you or put their hands on something you were using.. Its just so gross. ICK.