random? rational? irritatingly complex?

I’m sure there is a completely rational explanation for this but I can;t for the life of me figure it out his late at night.

1. First of all, pick the number of times a week that you would like
to have [insert random thing here like chocolate or sex]. (try for more than once but less than 10)

2. Multiply this number by 2

3. Add 5.

4. Multiply it by 50

5. If you have already had your birthday this year add 1752….
If you haven’t, add 1751……….

6. Now subtract the four digit year that you were born. You should now
have a three digit number …

The first digit of this was your original number (I.e., how many times you want to have [that random thing – chocolate, sex etc] each week).

The next two numbers are ……….

YOUR AGE! (Oh YES, it IS!!!!!)

See now I know there must be a reason why this worked. I know I figured it out years ago when I was sent it the first time but I am buggered If I can remember.

Thanks to Rob for the heads up.