In the case of the Syrian Civil War (2011–present), the male detainees experienced sexual abuse such as being forced to sit on a broken glass bottle, getting their genitals tied to a heavy bag of water, or being forced to watch the rape of another detainee by the officials. The rape of men by men has been documented as a weapon of terror in warfare (see also War rape). Several studies argue that male-on-male prisoner rape, as well as female-on-female prisoner rape, are common types of rape which go unreported even more frequently than rape in the general population. In the United Kingdom, epidemiological studies have suggested that the rate of male rape is higher in gay and college communities. As a group, male rape victims reported a lack of services and support, and legal systems are often ill-equipped to deal with this type of crime. According to psychologist Sarah Crome, fewer than 1 in 10 male-on-male rapes are reported. Male-on-male rape has been heavily stigmatized. The definitions of rape and "made to penetrate" in the CDC study were worded with extremely similar language. The CDC found in the 2012 data that 1.715 million (up from 1.267 million in 2010) reported being "made to penetrate" another person in the preceding 12 months, similar to the 1.473 million (2010: 1.270 million) women who reported being raped in the same time period. In the 2010–2012 National Intimate Partner and Sexual Violence Survey (and a prior edition of this study completed in 2010), the Centers for Disease Control (CDC) measured a category of sexual violence called "being made to penetrate" which captures instances in which victims were forced to or attempt to sexually penetrate someone (of either sex), either by physical force or coercion, or when the victim was intoxicated or otherwise unable to consent. Only recently have some other forms of sexual violence against men been considered. Most of the literature regarding rape and sexual assault focuses on female victims. The studies of sexual assault in correctional facilities focusing specifically on the consequences of this kind of rape were available in the early 1980s, but nothing was available during the previous years. Research about male-victim rape had only just begun to appear by 1980, focusing mostly on male children. Eventually, the male victims may be very vague in explaining their injuries when they are seeking medical or mental health services.
Most of the time, male victims try to hide and deny their victimization, similar to female victims, unless they have serious physical injuries. They might be afraid that people will doubt their sexual orientation and label them homosexual, especially if raped by a male, or that they may be seen as un-masculine because they were a victim and therefore many statistics underestimate how many males are raped due to their unwillingness to report sexual assault and rape. It may be difficult for male victims to report a sexual assault they experienced, especially in a society with a strong masculine custom. Community and service providers often react differently to male victims based on their sexual orientation and the gender of their perpetrators. Rape of males is still taboo, and has a negative connotation among heterosexual and homosexual men. This belief is still held in some parts of the world, but rape of males is now commonly criminalized and has been subject to more discussion than in the past. Historically, rape was thought to be, and defined as, a crime committed solely against females. A proportion of victims of rape or other sexual violence incidents are male.