Little white lies

Okay, I know everyone does it. Little white lies. They're supposed to be harmless, right? But what happens when your partner tells one.... and somehow it turns into a big fat black lie? You know, where you know it's a lie and keep calling them on it... they keep denying it and generally making it as though you're nuts. Then you finally prove the lie.... and then what? Then it's turned into this great big fight for something so stupid that shouldn't even register on the radar. Damn.

I don't know. What compels men to do this??? I mean, Dave knows how I feel about lying. He knows that I would rather him tell me, "baby I ran over you cat" then him tell me he found it dead in the street and I later prove that he did it. (by the way, this never happened... just an example)

Is it just me? Ladies, help me out here. Do your guys tell supposed "little white lies"? And how do you deal with it?