QUESTION:  
The average single woman does this about 25 times a year.  The average single guy, only five times a year.  What is it?   
 
It happens in the bedroom 

ANSWER:
The average single woman changes her bedsheets 25 times a year whereas the average single man only does it about five times  a year!  
                    
Congratulations to Nancy Rice of New Castle, IN for being the first to answer the Impossible Question correctly!