As a result of the film's title, discussions of the quirks connected with male behavior patterns often occurred during filming. Asked to define what she might consider to be a "guy thing," Julia Stiles says it's all about food.

"There's something about men when they get hungry, " laughs Stiles. "They have this severe drop in blood sugar. My dad does it. My grandfather did it. Every boyfriend I've ever had does it. You can be talking and having a good time, and all of a sudden it's 'I'm hungry. I'm hungry. I need food. Make me a sandwich now.' They get this tunnel vision thing where they must find food."

Jason Lee, on the other hand, insists that he doesn't actually subscribe to any typical male behavior. "I lead a totally unorthodox lifestyle," says Lee. "I don't watch TV so I don't sit with the remote control and drink beer. I don't eat TV dinners. I don't watch sports, I don't leave the seat up, and I'm not afraid to ask for directions."

Shawn Hatosy admits to having a few male foibles: "I play video games. I can debate with my girlfriend for hours about why it's okay for me to sit there and play a video game for six hours straight or watch football. These are the things I get accused of constantly."

James Brolin admits to never asking for directions and to being an inveterate channel surfer. The former habit had potentially serious consequences at one point. "I actually found myself in a situation years ago when I was flying an airplane and wouldn't ask directions. You're flying and you know you're in a little bit of trouble, but you won't get on the radio and ask for help."

The relevance of this film's theme couldn't be more timely, according to Chris Koch. "You hear a lot of guys lately talking about their genetic wiring," he says, "because we've discovered more about genes and genomes and how we're built. There have been a lot of documentaries on PBS and the Discovery Channel on this subject. You see, we're programmed to do some of these things. It's just the way men are. Guys watching with their girlfriends are saying 'This is it, this is what I'm supposed to do. I can't help it.'

"Of course, a lot of women respond by saying 'That's bullshit,'" he laughs.