Beauty Is In The Eye Of The Beer-Holder

A nice little article on the old BBC website gives this as the formula for the beer goggle effect (how attractive someone becomes after alcohol).

Aswell as the amount of alcohol consumed, it takes into account light in the room, your vision, and the distance from object of attention.

A score of:
less than 1 means no effect.
1-50 means slight effect.
51-100 means non-appealing becomes suddenly attractive.
more than 100 means minger becomes supermodel.

So next time you're out on the pull, don't forget your light meter, tape measure and calculator!