Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: Main Issue:
This week and last week we had overlapping travel plans. I traveled out of state to my parent's house for 6 days and he left town one day before I got back. While I was out of town he told his girlfriend that she could spend the night in his room when he was out of town. He didn't tell me about this until I got back. 

I asked for him for his GF's number which he gave to me. I then talked with her briefly and asked her why she needed to spend the night. After I learned that it wasn't necessary for her to be here, I told her that I was not comfortable with her being here without my roommate being with her. To me, she is his guest, not mine, so he should be here when she is.

Back story:
I recently got a new roommate. He started renting on the first of the new year and we haven't gotten a chance to know each other well. Already he has had a few different overnight guests, one of which had a dog and a 23 foot camper that she need to park on our street. He cleared it with me first, but I was annoyed that he was asking for something like that so soon into moving in.

I have come to believe he has a different expectations for personal boundaries than I. For example, one night I was making dinner when he came home from yoga. He came into the kitchen and started taking off his pants while he told me how he went the whole yoga class without realizing that his pants were on backwards. My girlfriend also rents a room in the house so it is not a single sex household. Either way, his room is right next to the kitchen and it wasn't necessary for him to change in my view. I didn't say anything at the time but I was bothered. He will also belch at full volume when he is in the house. It's loud enough that I can hear it clearly upstairs. We have also asked him to knock before coming up stairs to my or my girlfriend's room. Our rooms are the only rooms upstairs except for the laundry closet.

I am now thinking of asking him to find a different place to live.

I haven't spoken with my roommate about this yet. What do you think reddit? AMITA for telling his gf not to stay here? WIBTA for asking him to move out because I don't feel like him? 

telling my roommate's gf that she is not allowed to stay the night when my roommate is out of town