Um, it can affect some things. For example, I've been losing weight a lot -- I look great, actually -- the only thing that happened was that my breasts actually went down in size abit. Yet, 'cause I'm much smaller now, it still doesn't look "bad." I'm not uber worried about my breast size, but it's really annoying that I only have one bra that fits, and a ton of my close are lose on me. I look good otherwise. I have a nice waist line, etc, and other girls have been jealous of how skinny I am.