Ask any woman.

• 1

  The distance between your wrist and your elbow (and we're talking the internal measurement here) should exactly match the size of your foot. Try it. Put your bare foot against your inner arm and they'll be the same size. Male or female.

• 2.

  This is for the men. Might make the girls pay a little more attention to you. Or explain why they're looking at your hands. 

  The distance between the tip of your middle finger and your wrist should exactly  match the size of your manhood when erect.

  (Everyone runs off to test.............)