When Ashton Kutcher was growing up in Homestead, Iowa, his older sister Tausha liked messing with him. "I would fall asleep and wake up in full makeup!" he says. "Can you imagine how scary that was for a little kid, to wake up with lipstick, eye shadow and mascara?" There were no lasting effects. "I'm a guy's guy," says Kutcher, 25, who now makes his own mischief playing pranks on celebrities in MTV's Punk'd. "I don't comb my hair unless I have to, and I don't use lotions or fancy shampoos. My mom used to work at Procter & Gamble, and we used to get free shampoo. I was never picky about that stuff. So why start changing things now?" Even when he does try to change, things don't always work out for the 6'3" star of That '70s Show. "I lifted weights for about two months," he says. "I thought I'd get all beefed up, but my friends were like, 'Dude, you look just the same.'" He has been equally unsuccessful growing a beard, which he had to do for his upcoming film The Butterfly Effect. "I had patchy holes on the side of my face," he says. "But it still ended up in the movie, so you'll see when it comes out in September." His diet could also use a little filling in. "I don't eat my vegetables and I don't take my vitamins unless I'm sick," he says, admitting that he subsists on "tons of taffy." Single again after breaking up with Just Married costar Brittany Murphy last month, Kutcher says there's a lot more to him than a healthy metabolism, though. "I don't think my physical attributes are my best attributes," he says. "But people do say I have nice eyelashes. I have a double row."