Sylvester equation

[Becky]

An equation that tells you exactly how many beers you would need to drink to make a conscious decision to sleep with a girl. Person using the equation must be sober.
10 - X = # of beers
is the score given to the girl (1-10). [The subtraction] yields the number of beers one needs to consume.
*note: a beer can also be replaced by a 1oz. shot or mixed drink equivalent to [one ounce] of alcohol (40% or greater)