Heels amplify a woman's femininity

One thing I am always trying to work out is why high heels instantly make a woman look so much sexier. According to one line of research when a woman puts on heels it 'amplifies' her femininity, which it turn makes us males (most of us anyway) see her as much more sexual.

Because of the sexual amplification affect of high heels that is why men often agree that a naked woman in high heels is much more sexually interesting than just a naked woman.