If they do not consent or are unconscious or intoxicated and cannot consent, it's rape. Against a person's will is against the law. Survivors should get over the rape quickly. Most common are Post Traumatic Stress Disorder, Rape Trauma Syndrome, anxiety disorders, panic attacks, depression, eating disorders, self injury, and thoughts of suicide. It is easy to prosecute a rapist.
Rape is a woman's problem.
Men are often victims too. Very generally speaking, it is also men who are the rapists, and they need to learn to take responsibility for their actions. The justice system needs to make changes that place the assailant, not the victim on trial. Society needs to reject the misogynism that is present in the media and is ingrained in our families, schools, and government. We need to reject rape-glorifying entertainment and jokes.