The elephant in the room of almost any relationship in the age of Web 2.0 is, undoubtedly, Internet porn. Guys watch it, and their women either know or suspect they do, but nobody really wants to talk about it because, yo, it's nasty!

"Don Jon," a bawdy rom-com by actor-turned-director Joseph Gordon-Levitt ("Inception," "50/50"), lays it all out on the table. We meet beefy New Jersey dude Jon Martello (Gordon-Levitt), a guy who wouldn't seem out of place amid the cast of "Jersey Shore"; he's into working out, going to church and picking up ladies, who he and his bros hit on at clubs like heat-seeking missiles. But most of all, he's into Net porn.

Even when he lands a "dime" — as his friends refer to women they rank as a perfect 10 — he'll crawl out from under her sleepy embrace, slip into the next room, and get hard when he hears the Mac start-up chime. "Real pussy is good," he explains, "but I'm sorry, it's not as good as porn." Even when he starts to get serious with Barbara, a Jersey Girl so fine they had to cast Scarlett Johansson to play her, he still can't resist the siren song of "Lesbian Cheerleader" and "Amateur MILF Threesome" videos. The difference this time is that Barbara catches him. On the verge of relationship meltdown, he promises her he'll never do it again.