Just as the name implies, sexual sadists get pleasure out of inflicting pain on their victims. They want their victims to suffer. There's the physical pain, of course, along with mental torture and verbal and sexual degradation. The physical torture may be directed at sexually significant parts of the body, such as the breasts and genital area. And the sex can be very perverse in nature.
Sexual sadists plan ahead The weapon of choice is often a knife because it causes such anguish.
The sexual sadist likes to devote some time to his victim so he can prolong her agony and his pleasure. Captivity can last for hours, days or weeks. You'll often see that methodical preparation went into the crime. The victim may find herself in restraints, trapped in a sound-proofed car with windows and doors that won't open. The sadistic rapist may take photos or audio- or videotape the attack so he can relive it later.