7% body fat, or in some body building competition examples 4% body fat, is unhealthy. Yeah, it might be the epitome of body sculpting, but it's just not right to do that to your body. The guy at 14% is probably the healthiest of the bunch even if he doesn't have the ripped abs on the 20% dude.
As far as the pictures of the women, the muscle pics are unappealing to me. The paper thin skin is just looks odd on a woman. I like my women with like I like my shakes (if I drank them), thick and smooth.