Comic Book Guy's Razor Principle
The most insulting possibly explanation is rarely the correct one, but it's the first one you'll hear on the internet.
...when the evidence for applying the Razor is: "I know because I totally would've totally done the same thing, too, until I, like, grew up, man."
Forgot A Condom Sub-corollary (FACS)
...as SLAAC above, when the evidence of having grown up is that the speaker owns or jizzed in a snatch that produced a human infant.
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