If there's something you don't want your man to use, either let him know ahead of time or retaliate: You might find that some of his stuff is worth using, too. Long after What's-his-name stopped showering at my place, my love for his Mach3 razor and Kiehl's Ultimate Men’s After Shave Balm and Moisturizer lives on.

Primper, Party of One

Still, some things are sacred. A lot of otherwise enlightened men admit that seeing their women shaving, waxing, or bleaching gives them the heebie-jeebies. Most of us aren't too thrilled about doing it in front of them, either. "I won't even pick up a pair of tweezers if he's in the room," says Carolyn, who's lived with her boyfriend, Mike, for four years.

Try to carve out one night or morning a week when you can be alone to do your less glamorous upkeep, or simply tell him it's your primping hour and lock the bathroom door.

Of course, every couple is different, and it will take time to figure out your particular pet peeves. (For example, according to Zach, because "tube-middle-squeezers will be the end of Western civilization as we know it," both he and Karen have their own toothpaste.)

But let's face it: You're living together now, and, sooner or later, he'll catch you ripping off that mustache. When the fateful day arrives, make a joke and move on. Tell him that if it weren't for wax, he'd be dating Tom Selleck. He'll probably be grateful, not grossed out.