my uneducated guess would be that it is based upon the be a Man syndrome. Boys are taught from a young age either at home or by peers that to show what is seen as a weakness means you are less than a man.
Odd huh?
Boy's learn not to have any relationship with their emotions to the point that they will learn to morph anything emotional to anger, or turn to verbal fencing to avoid allowing themselves to be put in the situation where they have to face them. In time they almost always have to re-learn, or out right learn it isn't weakness but a part of being human.
In some cases I think this is key part of those whom are homophobic. Conditioning to avoid it because it makes you less than a man and not a woman. Little boy's through the word queer around as if it is the worst thing in the world for you to be, and if you are then you learn not to admit it. As they get older it becomes a reason to fight if someone dares to call you such. If you are you fear being labeled because it will be a youth of pain and suffering of another deeper personal kind than the one you are forced to live which is a lie.
Also on a personal note, I feel that not allowing your emotions to exist is more detrimental than divorcing them....
Males who have to face flowering emotions which are a totally new or forgotten thing go through even more emotional hell than they would if they just had to face the issues with something they understand, their emotions...
Tools of healing...
boy that should get a rise out of someone....