In observance of National Sleep Awareness Week, the National Sleep Foundation conducted its annual Sleep in America poll to find out: Do single women sleep better?

Cohabitation: the stuff that sleepless nights are made of. While many women relish the thought of snuggling into bed with a partner at the end of a wearying day, it turns out that slumbering with a significant other may be costing us a good night's rest.

According to the National Sleep Foundation's 2005 Sleep in America poll, three-quarters of those with bedmates say their partner has a sleeping problem. And when one person in bed is tossing and turning, chances are that so is the other. Almost the same number of respondents whose partners suffer from abnormal sleep say they also frequently experience sleep problems.

The biggest culprit? Snoring. Two-thirds of people in couples say their significant other's snoring keeps them up at night.

The average nonsingle American loses 49 minutes of shut-eye each night as a result of a partner's sleep issues. Totaled up over the year, that's 300 hours of lost pillow time. Considering that one-quarter of people surveyed said sleep problems continually affect their daily activities, those 49 minutes seem more precious than any other hour in the day. In fact, 50 percent of respondents claim they are often tired, fatigued or not up to par during the day. Seventeen percent say they feel this way almost daily.