Ok, enough joking...are you seriously not concerned about what this guy is doing inside your gf's house when you guys are gone?
What should I be concerned about? As far as I can tell, the ex-boyfriend seems like a relatively nice and harmless guy.
I'm pretty sure he is not a sociopath like all of you sick ####s whose first move would be to insert my toothbrush into your anal cavity followed by vigorous masturbating into my girlfriend's underwear drawer. I can't believe that this thread has resulted in me sticking up for the ex-boyfriend.