I forgot it's called Markley's Law, (Updated)

so I'm posting it to remind myself:
That has to be some kind of variant of Godwin's Law: As an online discussion of gun owners' rights grows longer, the probability of an ad hominem attack involving penis size approaches 1.

[Therefore, let it be know throughout the entire Internet that henceforth when an anti-gun bigot attributes the exercise of the specific enumerated right to keep and bear arms to the inadequate size or envy of male genital that it be referred to as Markley's Law, as first articulated by AlanR and named by Hank Archer.]

Update: Crotalus' Corollary: If guns are an extension of a man's penis, then men advocating gun control must want to be castrated.
(thank you, Joe)

Reminded of this by a visit to Joe Huffman's place