Why women around the world like sleeveless dresses? Whom they want to attract?

It is a common scene everywhere that, while men used to go fully dressed, they go fully covered in two-, three-piece suits with ties and mufflers etc., women like to go out in sleeveless, in see-throws, in high slits. Why is this? Are the women always in mind to entice on-looking men with their lush femaleness?