he probably has self esteem issues. No confident guy would care about what the media tells him to be like.
bluto, in case you still don't know why we like to be big, it is the same reason we all try to become rich, get quality pussy, have a nice car, MALE DOMINANCE. We are like most other primates.
the media in this case just reflects reality. there's been surveys where girls can vote which body they prefer on AVERAGE guys and guess what - they do not pick the muscular guy. ever.
as for dominace - i think you're right - dominance over OTHER MALES. not to get woman.
because in the real world muscular guys dont get the woman. the average joes and the skinny ones does.