Lyric discussion by MrOrgongorgo 

I read in my biology class that the structure of a man's penis was derived from fish, and I know that "foam-crested brine," is supposed to be jizz. It's a song about a wet dream, and how it didn't leave him feeling fulfilled. Sure, his wet dream may have felt good while it was happening but, once he woke up in the morning, he realized that his appetite for sex was gone. He talks about waiting for the next full moon(when he regains what he lost) so he can lose it all again.

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