Why do women wear bras?

Women wear bras for several reasons that include support, shaping, and modesty.

Support is one of the primary reasons for wearing a bra. Heavy breasts can put a strain on women's backs. Also, many women feel more comfortable when breasts are stabilized. 

Shaping is another reason for wearing a bra. Sturdy foam cups can help create a rounded look for most breast shapes.

Lastly, modesty is a big reason women wear a bra. Bra cups help nipples from showing through clothing.