Ruined orgasms are orgasms that are purposely halted as part of tease and denial play. A partner is stimulated through various sexual acts to the very brink of climax until stimulation is abruptly ceased.
In some instances, the orgasm does not happen, and whether more stimulation occurs depends on the scene or relationship dynamics. In other circumstances, the orgasm does happen, but it is perceived to be less intense and satisfying. The result is meant to be frustration at the sudden end of pleasure. In fact, as part of the tease and denial play, it will heighten the sexual experience.
Ruined orgasms are generally associated with dominance/submission play and can be a fetish for those who fall on either side of the sexual control coin. Most depictions of ruined orgasms are in female domination/male submission situations—femdom—but any relationship configuration can enjoy this play.
For people with penises, a ruined orgasm can still result in ejaculation but with lesser feelings of orgasmic ecstasy. Since much of the pleasure for the parties is psychological, the feelings in the body can be secondary.