What defines a woman?

[ThisPinkWyvern]

What is the biological characteristic shared by all women that differentiates them from men?

Well let's be honest it ain't high heels and a preference for fake boobs now is it?

quite

Lets do Mexican Wave

That would be a transverse wave.

OMG, just spent Friday night trying to teach my spawn electromagnetic waves!!! (I think I'm a woman because he came out of my fanny)

I've actually downloaded the image for the boy!