And this without even counting society's expections which can fuel the tensions even more. You talk about NPA-/NPA= males and indeed in males we tend to ask for manliness, that is, avoiding showing weakness. That's all the more true if they are in charge in their daily lives. Judging from my experience, internal tension becomes overwhelming when you try to maintain a role or an attitude that's not corresponding at all to your real state of mind for a very long time.
Crying is a way to release tension. As well of masochistic activities such as seeing a dominatrix or self-depreciation can be. There is no shame of doing this as long as your purpose is clear and you're aware of what you're doing. What can make these activities dangerous in my opinion is compulsion (or at the reverse extreme control and repression).