For many fathers, the day their daughter gets married is the day they must give up the role of being the leading man in her life. Gayle talks with W. Bruce Cameron, himself the father of two adult daughters and author of 8 Simple Rules for Marrying My Daughter: And Other Reasonable Advice from the Father of the Bride (Not That Anyone Is Paying Attention), about his humorous guide to help dads cope with this tough transition.

Bruce says the first rule in his book makes it clear that fathers would prefer their future son-in-law ask them for permission to marry their daughter before popping the question. If they don't, he says there could be consequences. "It's a sign of respect, and it's a great time to tell the prospective son-in-law that while the daughter might be in love with you, you could still be killed," Bruce jokes.

Another rule Bruce says young suitors must know is that while the bride-to-be is unique the groom is replaceable. "Don't think you're so special," Bruce says. "As far as I'm concerned, we could find a reasonable facsimile for you in the crowd at the wedding and swap you out at the last minute."

All jokes aside, Bruce says that watching your daughter grow up and get married is a bittersweet experience for dads. While the bottom line is his daughter's happiness, he'll always being looking out for her no matter what. "Let's face it, this guy is going to be part of the family, and I want to know that I'll accept him with open arms…under certain conditional things," he says. "Or that I'll be evaluating him over a long period of time—forever!"