No one has ever taught boys to express emotions.
They are taught expressing emotions makes them weak, which is not true.
So the only way they now how to express emotions is through violence.
Through drinking. Through money.
They should learn to express their emotions through saying how they feel, singing, and dancing.
It will not hurt them to cry every now and then :)
They should learn to express their emotions. Girls have already "mastered" this. :)