Context

Tonight I came across this quote:

"im so glad i brought the else. I was just using up my teeth."

In context, this makes perfect sense (aside from spelling and punctuation errors), and is rather funny. Out of context, it makes no sense, and is still rather funny, but in a different way. I like things like that. If you know what this refers to, you win. If you don't, and can discover what it means, you also win.