"Going for more than a week without sex is really, really tough," - Randy, married eight years, three kids

"Three or four times a year would be about right," - Kendra, married eight years, three kids

"After kids, everything changes... we're having sex about every three months. If I have sex, I know my quarterly estimated taxes must be due. And if it's oral sex, I know it's time to renew my driver's licence." - Ray Romano, comedian and father of four

The Grand Canyon

Grand Canyon? Is it really that bad? Are men and women really standing on opposite sides of a gulf that wide and deep and foreboding?

Well, maybe you're one of the lucky few for whom things are just humming along quite nicely, thank you, but, having talked to as many people as we have, we can assure you that you are decidedly not normal.

After having children, women minimize the role of sex in their marriages. They experience a seismic shift in desire and ability. Men still want sex, and the emotional outlet it provides, as often as possible.

The wife's supply cannot meet her husband's demand. For most couples, it's an equation that just won't add up, no matter how they do the sums.

It can look something like this:

Janet: "I finally sank into bed after another day in the trenches when my radar went off. Oh God, Kevin had that look in his eye and "it" started inching over from his side of the bed... the paw!

"At that moment, here's what ran through my head: 'Does he think that's a turn-on? He does bugger all to help me out, then expects me to take care of him? We hadn't even had a conversation! What am I, a 24-hour shop? Open for business at his convenience?

"But if I say no, he'll get all sulky. Maybe I could just lie here for five minutes - but God, I don't have another ounce of energy. Is that sick in my hair?'"

Kevin: "Well, what do you know? Bam! She slams the door right in my face. Second time in a week. I'm just this working robot to her. She never wants to do it.

"I'm sick of this. I feel like I have a roommate, not a wife. What am I supposed to do? Watch dirty movies in my hotel room?"

Sound familiar? We've all been there. Grand Canyon? Great Divide? You tell us...