The perhaps important thing to consider is that all are unique
individuals, be it of different sizes. It's really up to one
individual whether he chooses to look externally or internally or
both.
I understand your first point mistyblue, the question and statement
that girls can be like guys in terms of choosing guys the way most
guys choose girls. And girls of course are created from the
beginning to have an emotional background, meaning that they
express their emotions more towards other people around them. With
this major component in them plus our advancement in IT knowledge
in the turn of the century, girls have become more demanding, but
although no matter how demanding they are, they will eventually
settle down for second best. Most girls I see, and I have to really
praise them, they don't go for external beauty. Most end up with
guys who are not up to the standard that you mention in the muscles
part but still they love their partner extensively, and that is a
miracle. Although when gathered with their friends, they would talk
about guys who have muscles, look macho and have a great
personality and a warm heart.
Girls go for love and falling in love when choosing a
partner...
Guys are more egoistic and we all know that from the beginning,
since they are given the duty to be the leader of the house. And
from this main and sole responsibility, they tend to cultivate that
character in many parts and sectors of their lives. It's normal and
natural for them to act like this, but if this can be brought under
control, they would have been great 
