Build a foundation for better orgasms while having an orgasm with a pair of Duotone Orgasm Balls. Like ben-wa balls, these can be used to strengthen vaginal muscles for increased tightness and pleasure during sex. They can also function as a sex toy in their own right, vibrating you internally and externally to a full body orgasm! Experiment with all the different ways you can find pleasure with these pink marble balls, scientifically weighted for your pleasure. Duotone smooth plastic balls are weighted for vaginal exercise. String attachment for retrieval.