Women tend to look at and judge themselves on other women's bodies while men seem to avoid looking at other men.
While women notice other women in terms of "she's better/not better looking than me" men look at it in terms of "I wonder if I can outdo/beat him" (at least that's what some men have told me).
I used to have body issues not long ago. I was ashamed of my hips and it seemed to me I was not proportioned well; my legs were too thin, my hips too big my bust too small etc etc etc. It was never really about my WEIGHT, but rather about my shape.
I'm happy now though (I still have this urge to pick up a grinder and use it on my hips!) but I've learnt to utilise what I have.
However, my life has changed drastically to the point where I have a lot of male attention and have been told to start modelling from here and there and I'm afraid my head will out-grow my hips! I'm not a vain little bitch, but I'm sared of being one...