Well now, at least...I don't feel alone. The website Mattress Advisor interviewed more than 1,000 Americans on their sheet-changing habits and found single men often wait as long as six weeks before changing their sheets. After having sex, single guys waited another 11 days before removing their used sheets from of the bed.

The survey also shows the average person waits 24 days to change their sheets. Hygiene experts typically recommend washing or changing your sheets every week to two weeks, at most.

Single women fared slightly better in the survey -- changing their sheets at 19 days and taking the sheets off the bed four days after having sex.

Married couples tend to have a cleaner sleeping space than singles, changing the sheets every 19.9 days and pillowcases every 22.6 days on average, compared to singles who left sheets and pillowcases on for 37 and 34.6 days, respectively.

Researchers said, "Relationship commitment seemed to correlate with more frequent washing. Respondents in a relationship had the shortest average time between pillow cleanings, while married folks had the cleanest record for sheets."

The average person will spend a third of their life in bed and drip around 26 gallons of sweat into his or her sheets every year, and sheds about 10 grams of skin each day with much of it going onto the beds we spend a third of our lives lying in.