My roommate [M]asturbates in his sleep

I used to live alone; however, last month I decided to move, as the rent was too steep for me. I saw an add for a two room apartment and thought it’d be great.

I moved in and thought it was pretty neat. It’s not a two room apartment, it’s more like a one bedroom with two separate beds. The guy who I was going to share the apartment with seemed like a pretty cool guy, until night came. Every now and then during nights/bed time I would hear grunting and obvious sound of him masturbating (if you’re a guy, I am sure you know that sound). For couple of weeks I kept it to myself and didn’t really do much about it. However, as it was getting more frequent, I would show signs that I am still awake by (fake) coughing and stuff like that. Still, he didn’t stop, until… well, you know, until he was actually done (I assume).