i'm thinking eminem was being satirical with this song. it is literally line after line after line after line after line of straight metaphors and gay punchlines. some of them are clever but i get the idea that he is making fun of other rappers who do this while at the same time showing them how easily he can do it better than them.
"how you douche bags feel knowing you're disposable?"
stab at generic punchline rappers during his punchline song???
"you say that you want your punchlines a little more compact well shawty I'm that man
these other cats aint metaphorically where I'm at man"
shawty? LAWL. he sorta implies that he's giving them what they want, and then says he's better than everyone else at it???
the flaw in my theory is that he continued putting out songs filled with metaphors and corny punches.
worth a mention imo.