Society gave roles more deeply than biology.
As an animal specimen, humanity has females and males.
In humans, females may have the ability to give birth, and males to help them supply the food for them and himself when female is pregnant (if he is nice enough).
In spite of that, we are the same: if we all are healthy and ordinary, we have 2 eyes, 2 arms, 2 hands with 5 fingers on each one, one brain with 2 hemispheres, 2 legs, 2 feet, and with the same number of muscles and bones.
The problem here is that someone else in a particular time of history, said that males should have short hair, and women should be fit, or that males should have long hair to demonstrate his virility, or that to be a fat was a sign of power and wealth.
It's incredible how the technology had advanced and how short we are in freedom of genre roles.
My personal view here is that there are some men who are happy being fat, others slim, others want to be strong, other flexibility, others don't care at all about their bodies, others who only care for learning and intellectual activities, or meditating in Buddha, or whatever, etc. Nothing more and nothing less, just as any women.
So, as you may see, there are thousands of different attitudes and lifestyles.
Everyone has to find one's own place, and one's own attitude and feel comfortable and happy with it, or as much as possible.
If someone likes muscles, this is totally independent from one's genre, age, race, or hair color. Who are we to discuss anyone's likes or dislikes?
Ain't a good sign in boring social habits to see rebel people?
How about becoming what you want?
Just a point from a fat mid-aged woman from spain who wants to help on training some thinking brain muscules...