Try to use this fanny formula to determine your derriere’s overall appeal. From the marginally scientific but totally entertaining. In 2006, David Holmes, Ph. D., a leading psychologist in the U.K., devised this methematical formula for defining the “perfect female ass.” Dig out your calculator, here it is :

REAR RATING = [(S+C) X (B+F) / T] – V

S : Overall shape – rate 1 to 5

1= Deflated beach ball

5= Volleyball

C: Cheek circularity – Rate 1 to 4

1= Croissant

4= Grapefruit

B: Bounciness – Rate 1 to 5

1= Jinggles like Jell-O

5= Rebounds like a rubber band

F: Firmness – Rate 1 to 4

1= Marshmallow

4= Bounce a quarter off it

T : Texture – Rate 4 to 1*

4= Crater Island

1= Bambino-smooth

V: Vertical Ratio – Rate 4 to 1*

4= Upside-down heart

1= Right-side-up heart

For T and V, 1 is the best.

If you scored 80 or close to it, your buttocks are virtually perfect a la Kylie Minogue, whose tush Holmes’s focus groups deemed a perfect 80. If you scored below 40, get your butt in gear and retest yourself after working your butt out for a month.

perfect 10!

sexy back huh, justin?