felecia187 i did not know this yes even us smart people have something to learn , so your belly button is you center of gravity did not know that , and it will tell people if you are a runner or a swimmer , if you have a higher belly button then you are a runner , if your belly button is lower then you are a swimmer , men and women both even thou and yes i know this one women s center of gravity is at there hips even if you get a sex change the center of gravity is still at your hips , and a mans centre of gravity is right below his nose , and women s hips are still a women s hips after a sex change and women have one more vertbrate then men , maybe something to the Adam and Eve with the rib thing so ,enjoy .