666 dating rule
The 666 dating rule is a subset of related hypergamy theory that goes into specifics of female hypergamy. It does this by simplifying hypergamy around the number 6. Examples of qualities centered around number 6 that women yearn for include a six foot height (at least), a six-pack abdomen, six years of higher education (i.e. a university degree), six months since last relationship, a 6,000 sq ft house, a six inch penis (at least), a six-hundred horse-power car, a six-figure salary, at least a 6th decile in terms of facial attractiveness. The associations of these male attributes with the number 666 derives from the shallowness and superficiality of such high standards that some associate as being equivalent in evil to the Number of the Beast (666). However, most women realize that such perfect requirements in a man will probably doom them to be a permavirgin cat lady. Therefore most women give some leeway.
Opposition to the hypergamy associated with the 666 dating rule is called 666phobia.