Murphy's law is too classical, here is the Maafia's law.
(1)
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Let "x" = beauty, "y" = manners well-bred,
let "z" = fortune (this is obligatory).
Let "L" = love, then our philosopher said,
L is a function of x, y, and z-
of the kind which is known as Potential !
(2)
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Now integrate L with respect to dt,
("t" standing for time and persuation).
Then between proper limits, its easy to see,
the definite integral "Marriage" must be-
a very consise Demonstration !
(3)
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Said he- if the wandering course of the moon,
by Algebra can be predicted.
The female affections must yield to it soon,
but the lady ran off with a dashing dragoon-
and left him amazed and afflicted !
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The mathematical expressions of love, L, and marriage, M, as seen in stanza (1) and (2) can be written as: