It's important to remember that men are also victims of sexual assault. It is estimated that 10 percent of men will be sexually assaulted in their lifetime. Sexual assault can range from voyeurism and public indecency to rape. Not all sexual assaults constitute rape, but all sexual assaults deserve to be taken seriously. Think of erogenous zones as anything a bathing suit covers.
Rape includes attempted rape and rape with an object.
Note that consent is a major issue in defining sexual assault, particularly when the two people involved know each other. Note also that resistance is not necessary in order to prove non-consent. When one or both individuals have been drinking or doing drugs, consent becomes even more complicated. Legally, intoxication is not a defense against sexual assault, and non-consent is assumed if a person has been drinking to the point where her ability to consent is impaired. Aside from the legal issue, drunken sex is also ill-advised because it's risky in terms of unwanted pregnancy and disease transmission.