Sexual sadism disorder is the condition of experiencing great sexual arousal in response to the involuntary extreme pain, suffering or humiliation of other people. Several other terms have been used to describe the condition, and it may overlap with other conditions that involve inflicting pain. It is distinct from situations in which consenting individuals use mild or simulated pain or humiliation for sexual excitement. The words sadism and sadist are derived from the French writer and libertine Marquis de Sade, who wrote several novels depicting sexualized torture and violence.