I live in a co-ed house with three guys and three girls. There is one guy that would knock on my door at weird hours of the day or night and just walk right in. One of my girl friends said he probably does this to get a glimpse of me, unconscious, in bed, in my underwear. He also is grossly messy in the washroom; he leaves his damp towel on the floor, hangs his sweaty workout clothes on the shower curtains, leaves his toothpaste open on the counter, and leaves the toilet seat always covered in dirt marks and pee. He also likes to play music loud while studying. If it wasn't for our house being so close to campus, one of my roommates able to car-pool us, and the rent being manageable, I would move out asap. I guess life likes to throw us curve balls. [and to those that would comment and tell me just talk to him...I have. We also talk as "family" about boundaries within the house].