Although many victims of domestic violence resist reporting the violence, male victims have particular issues that most female victims don't have to contend with. Often victims of any gender don't want to report because they are embarassed, or they are afraid of making the problem worse (when so-and-so gets out of jail they're going to be REALLY mad), or they don't want the abuser arrested (for many reasons). Male victims have to contend with "machismo" - what their friends and family will think if it is discovered that they "let" a partner abuse them. There is also an element of total disbelief - not only from the victim, but sometimes confirmed by friends, family, police, and medical personnel - especially when those persons are also male - as victims are unwittingly, yet strongly, encouraged to minimize the importance and impact of what they experienced (oh it's not that bad, or, it's only a scratch). Trying to report once, and meeting this reaction is a primary function of why so many men never report again, or never report at all. Instead, they'll make excuses (oh, I got that scratch while trimming the bushes, or, look at this bruise I got playing football), or try to escape being around the abuser by dedicating their time to work or other pursuits as much as possible.
(Link)