Sums up every discussion I have with my colleague.
Him: "Hey, you already wrote something similar to <coding stuff>, right?"
Me: "Huh, maybe?"
Him: "Where can I find it, I need to write something similar"
Me: "I have no idea *start searching*"
Him: "Ok, found it, you did this and that, why didn't you do that instead?"
Me: "I DON'T KNOW!!!"