Crying

The release of fluid from the tear glands, often accompanied by a strong emotion.

Many people find it arousing to induce the production of tears in an individual, often a woman, out of a preference for the look of streaked or runny mascara and eye liner.

Very, very few people enjoy causing a person to actually cry, or enjoy inducing the strong emotions in another that would cause them to cry.  These people are referred to as sadists by society and are rarely the kind of people anyone wants in their life.