I allowed my old friend from high school to stay in my place for free meanwhile he gets on his feet in the new city we live in. The son of a bitch only has only one week here and he already brought a girl over, and he obviously fucked since she left in the morning. How the fuck did he do that? This shit got me so angry I want to kick him out and make them fuck on the street instead. No but seriously how do I tell him to chill with that without sounding like a massive seether?