Just got this from my Daughter, worth a try 
 
   Ladies your secret is out of the bag
 
      don't  tell me your age; you probably would tell a falsehood  anyway  
 -but  the Hershey Man will know!  YOUR  AGE BY CHOCOLATE MATH  
 This is pretty neat. 
 DON'T CHEAT  BY SCROLLING DOWN FIRST!
 It takes less than a minute .
 Work this out  as you read .
 Be sure you don't read the bottom until you've worked it  out!
 This is not one of those waste of time things, it's  fun.   
 1. First of all, pick the number of times a week that  you would like to have chocolate (more than once but less than  10)    
 2. Multiply this number by 2 (just to be  bold)     
 3. Add 5     
 4. Multiply  it by 50 -- I'll wait while you get the calculator       
 5. If you have already had your birthday this year  add 1759 ..
 If you haven't, add 1758.     
 6. Now  subtract the four digit year that you were  born.      
 You should have a three digit number           
 The first digit of this was your  original number
 (i.e., how many times you want to have chocolate each  week).          
 The next two numbers are   
 YOUR  AGE! (Oh YES, it is!!!!!) 
 THIS  IS THE ONLY YEAR (2009) IT WILL EVER WORK, SO SPREAD IT AROUND WHILE IT  LASTS.  
 chocolate  Calculator.