Credit in the straight world

The pizza guy came earlier tonight and some funny things happened. First, when I gave him three 20 dollar bills for a 50 dollar purchase he claimed not to have any change, and instead offered me a copy of his 10-dollar CD. The title of the CD was a rape pun. I agreed to this deal because I felt guilty turning him down. Then, later on when I was sitting down at the kitchen table to eat some pizza, I saw the three twenty dollar bills sitting right there. I had to think for a second about whether I had a responsibility to do something about this, and decided finally that I should be honest.