I’m talking dirty and nasty between the sheets, but its not what you think!! Listen up ladies, if he makes the bed you may not want to lay in it! Especially if he is single. A UK mattress company survey revealed that single men between the ages of 18-55 change their bed on an average of four times a year. EWWW?! So ladies, if you plan on laying in between the sheets, you may want to wash them first!