As a fairly HD man, I can tell you that my happiness (or anger) is strongly determined by sex. I fortunately have not resorted to violence, but a man's disposition can be greatly influenced by sex, and the higher the sex drive, the more it will impact him. In fact, as a HD man with little sex, I would think that it would be virtually impossible to be happy overall. Sure, individual things can cause happiness, but overall happiness is really not possible if you are sex starved. It will cause low grade anger, and I can see where a man could lose his cool over it.
