There is no science to fitting room etiquette, but it goes without saying that it's suspect if a couple brings 25 items into a fitting room together. You're not being slick or fooling anyone. While you might be able to "check one off your list," this is disgusting. Fitting rooms are hardly cleaned past a quick vacuum. Would you like to try on your new hot jawnz in a room that features another's fun and funk? We didn't think so. Also, the last thing you need is to get kicked out of your favorite store, or receive a no trespass order from a mall. Online shopping is cool, but what are you going to say when your next fling wants to know why you can't walk through the mall with her? Awkward. Anyways, Burger King bathrooms are cooler, ask Humpty Hump.