Ben Stone (Seth Rogen) is a feckless oaf with a wide grin, a bong, and four lazy housemates who are tooold to be boys but will never, unless fate takes a hand, bother to grow into men.
In other words, they are learning many of the same things that people do, except they do not get tired or sick, never ask for a raise and when they get tooold to function effectively, their hardware can be replaced.