Messages like this are most often directed toward women. Women are perpetually reminded to maintain their legs, underarms, face, arms, and pubic area as utterly hairless or perfectly sculpted. This is problematic for a number of reasons. First and foremost, it allows women to develop body image issues over how well their appearance conforms to social ideals. Along these lines, it also encourages people to judge and demean each other based on appearances.
These situations and examples relate to all aspects of appearance for women, including dress, hairstyle, makeup, and more. However, I believe that the issue of body hair is the one that causes the most trouble for women. Those who do not maintain the ideal expectations of hairlessness are met with disgust, harsh words, and harassment because of their decision to accept their body naturally. This is incredibly sad to me. Everyone should be able to love their body as it is (or change it if they so choose!) without the scrutiny of others. Frankly, my body is hair is nobody's business but mine!