Talk show hosts and stand-up comedians make fun of sexless marriages, but it turns out the married couples who do have sex are getting a fair amount, according to one article.

"Sexual activity is 25 percent to 300 percent greater for married couples versus the non-married, depending on age." -- Marriage and Sex, Discovery Health.

As for the myth about parenting killing bedroom romps, only 1 and 5 married couples are in sexless marriages, defined as having sex 10 times or less a year, according to Michele Weiner-Davis, author of "The Sex-Starved Marriage: A Couple's Guide to Boosting Their Marriage Libido."

But, 1 in 3 married couples have a "desire gap," where one partner wants more sex and the other basically says, "What's the big deal?" Weiner-Davis says.

Not surprisingly, no sex raises the chances of extramarital affairs and divorce, Weiner-Davis adds.