Unrealistic expectations of either gender can lead to extreme body dysmorphia and eating disorders. And no, I'm not referring only to women with bulemia and the like. Body dysmorphia in men manifests in several ways as well, including compulsive body building and steroid abuse in an attempt to appear strong enough to qualify as a man.
I've actually read a few op-eds over the last couple of years that question whether or not Marvel's fixation on the body beautiful in their movies might be having unintended negative side effects on some young men.
Sure, but that's isn't really what i meant by the use of the power fantasy. I just mean that fantasy is fine, if you enjoy it in whatever style in manifests for you, power, uh....erotic, whatever.
Everything should be taken in moderation, and someone who can't separate fantasy from reality should be carefully monitored. But in general, enjoying the fantasy of something is typically no harm no foul.