Dildos can be manipulated with your own or a partner's hand or worn using a harness. If you want to wear a dildo, you will need a dildo that flares at the base so it won't fall out of the harness. Dildo harnesses can be used by two women, by a woman who wishes to penetrate a male partner, or by a man whose penis is not erect at a time when he wants to have intercourse. These harnesses are designed primarily for women, but some fit men as well.