The perineum is the area of skin rich in nerve endings that is located below the anus (the opening for bowel movements). For women, the perineum extends to the vaginal opening; for men it extends to the base of the testicles.
Because the perineum is so rich in nerve endings it often feels pleasing to have it touched or stroked. If one is comfortable with being touched on the perineum, its stimulation can be incorporated into a couple’s lovemaking to further enhance sexual arousal. To make stimulation smoother and more comfortable, it is often helpful to lubricate your fingers before stroking the perineum during lovemaking. As long as the stimulation remains outside the body on the perineum, any type of lubricant (petroleum-base or water-base) will do. However, because this kind of stimulation is often associated with insertion of the finger into the vagina or anus, or both, a water-base lubricant is recommended and preferred.