After years of wondering and wasted research money, I myself have finally come up with the conclusion as to why females exist...

They are life support systems for vaginas.
Men like looking at breasts, especially the cleavage. The cleavage! Thrusting it out at me, making me do things, making me listen to you -- it's crazy. I can't do that. I can't walk around with half a testicle hanging out, can I?