Someone familiar with Kevin Smith's movies - Mallrats, Clerks I and II, Chasing Amy -- may tingle with déjà vu when Zach (Seth Rogen) and Miri (Elizabeth Banks) do the morning zombie shuffle through their platonically shared apartment in the opening scene of Zach and Miri Make a Porno.  No matter how disheveled each appear, and no matter how strong the "we're just roommates with no fringe benefits" vibe is initially conveyed, Kevin Smith is setting us up yet again.  She may not have had her coffee yet, but Miri is obviously the "really hot girl" which no amount of sleep deprivation can undo, while Zach is, in spite of all lattes he'll drink at his barrister job later that day, the not so great looking teddy bear that the really hot girl is going to fall for. 

Ok, so maybe it's every guy's fantasy that, in spite of being average, or even slovenly and below average, the really hot girl is going to ultimately fall for him.  Kevin Smith however takes this to a new extreme in his films by making the really hot girl into some kind of Freudian superhero. Not only is the really hot girl a really hot girl, and not only is the really hot girl a really hot girl who doesn't know she's a really hot girl because she has an ugly duckling complex, and not only does the really hot girl fall for the less than swanlike prince every time, but she's not even a girl -- she's a guy.

Think Michelangelo.   Michelangelo painted Eve over and over again in the garden but every time she still came out an Adam, all brawny arms and musculature.  While Smith's really hot chicks don't look like Adams, they speak with the figurative Adam's apple:  "Dude!"  Man..." "THIS is what you do to a girl to make her ___"  In Chasing Amy,  the sort of lesbian heroine Alyssa still speaks in boy-lingo and is the ultimate tom-boy in spite of her impossibly breathy voice and cascading over-one-eye blonde mane.  In Clerks II, Rosario Dawson's tomboy Becky is a foil to Dante's first fiancée's blondness, tight clothing and hyper sexuality, and she desperately loves Dante is in spite of his obliviousness and mediocrity. Banks' Miri, perhaps the most conventional of Smith's really hot chicks, does not have anything distinctly feminine drawn into her character and seems somewhat undefined until she falls for Rogen.

On closer look Kevin Smith's really hot chick fantasy is not that average at all but of a very particular kind.  In spite of Zach and Miri's porno and Alyssa's suggestive high school nickname "finger-cuffs," Kevin Smith's fantasy unravels in the 13 year old male psyche.  The 13 year old may look like he's 25, maybe even 35, but he still writes comic books or works in retail while hanging with his best friend (male) and other best friend -- the really hot chick -- who may as well also be male, because even though she's already grown boobs she's otherwise undifferentiated from the 13 year old boy fantasizing about her, and is therefore entirely unthreatening.

When Kevin Smith's heroes grow up its often after their first meaningful experience with the really hot chick, who inspires him to be a better boy-man without wanting anything more from him than what he already is.  Clerks' Dante has his eureka moment after connecting with Becky, and for Zach, he begins to mature into boy-manhood after beginning to realize his love for Miri and sleeping with her for the first time in their amateur porno ("On 3 we'll kiss. 1...2...3!").   Each boy-man begins to mature, but in what can only be called Kevin Smith terms -- Dante from a clerk into a store-owning clerk, Zach from porn star to porn producer.  

Kevin Smith had once been commissioned to write the screenplay for what ultimately became Superman Returns.  His version wasn't given the green light but perhaps, given the blasé reception of Superman Returns at the box office and Superman's prevalent teen male demographic, it should have been-- even if Lois Lane is the only one who ends up sporting a six pack and a pocket full of kryptonite.