An "anal orgasm" is an orgasm brought on by anal stimulation, such as from anal sex, an inserted finger, or a sex toy. Anecdotal evidence suggests that some women experience anal orgasm as qualitatively different from clitoral or vaginal orgasm, though for many others the distinction is less clear.
In both sexes, pleasure can be derived from the nerve endings around the anus and the anus itself. Hence, anal-oral contact can still be pleasurable without stimulation of the clitoris....