If you were Shane, a fresh-faced teenage boy from Des Moines, Iowa, slopping spaghetti in a strange house full of shirtless people just like you, what would you say to Marc Jacobs‘ character when he asks if you want to make money from “jerking off,” with the one rule that you have to trust him? That’s the pivotal scene in the smut thriller Disconnect (in theaters Friday), in which the designer plays a kind of male madam, making money off of yet protecting young runaways, that also stars Jason Bateman, Alexander Skarsgard, and Hope Davis…