person A: You ever have a situation where you help someone out and just end up regretting it?
person B: yes_comma_ that is always a hard situation.  
person A: Yea_comma_ I once let this guy crash on my couch rent free for 3 months_comma_ and the entire time he was taking money out my room and eating my snacks without saying anything. I knew things were missing_comma_ but he'd always deny it.
person B: oh man that is horrible!  I am so sorry
person A: Thanks_comma_ I guess some people are just scumbags. I don't understand how you can take advantage of someone who is helping you.