I was thinking of those old pairs of maxims that appear to contradict one another, as in:
Too many cooks spoil the broth
Many hands make light work
And I remembered the one that says:
Men don’t make passes at girls who wear glasses
(...which is nonsense, of course. Glasses mask the eyes, and in so doing they place a subtle barrier there that hints at privacy. Privacy is a very engaging and alluring trait in a woman.)
Nevertheless, it seemed only fitting that the maxim ought to have at least a complimentary, if not actually contrary, twin, so how about:
Men who belch and pick their nose do not attract the girlie-o’s.
I seem to be functioning at base zero tonight. Must be all this emptiness.