Watch this compelling TEDxYouth video where Caroline Heldman explains how women and girls being treated and seeing themselves as sexual objects is damaging in many ways, including diminished sexual pleasure. Sexual objectification - which she defines as "A key process whereby girls (and women) learn to think and treat their bodies as objects of others' desires" can lead to depression, eating disorders, body shame, lower GPA, and competitiveness with other females.
Girls and women are especially susceptible to the influence of objectification today because images in the media are rampant, and we all consume a lot more media and advertising than we used to. Objectifying ads aren't subtle - take this ad for example, which seems to say the reward for being a stylishly dressed woman means you get gang raped by handsome men, instead of plain old ugly ones. This is just sickening.
I think it's important that women take care of their health and appearance - but to please and take pride in themselves, not to become objects for male pleasure. Anyway, watch the TEDx video, above. It will make you take a new look at advertising and television. It made me realize why I've been disturbed by the opening sequence of HBO's True Detective - it's filled with objectifying images of naked women.