Sorry for posting late here, but I just want to mention that the same is true for women, only in a different way...
First of all, I agree, men are discouraged from crying; which is so unhealthy in my view, since crying puts a person in touch with his humanity and provides the body with a powerful psychosomatic/mental relief. We came out of the womb crying, and continued to cry even after we learned how to speak. Not to cry out of joy or pain for months or even years (!) at a time, I would think, is definitely a result of mental repression. (Although in the current world we live in, I can see how this repression is often necessary for mental survival.)
And a lot of women may say they don't like to see a man cry, and neither do I...but why would I? I also don't like to see a child or a woman cry. At stated, it is repressed in our culture, associated with negative connotations such as "weakness" and "frailty," and so it makes everyone uncomfortable. Let alone "howling" in pain at a funeral--that sounds so healthy!--I do wish I heard that.
But what about women? Not in terms of crying, but in terms of accessing their deep, true feelings? I know so many women who are neurotic, and I'm sure it because of a similar type of repression. Whenever women DO express their emotions, it comes out totally skewed (like yelling at a boyfriend out of nowhere) or viewed as taboo (i.e. "she was freaking out," "acting psycho," etc.) I don't think people, and especially women, are given any cultural tools to appropriately access this part of themselves.
And while it makes us neurotic, I also think it cuts us off from a great, great source of power.