I don't have much very much experience, in fact, I've only been involved in one 3some, but if was with my husband, and another woman. I'd say it was 75% because I wanted very much to have an experience with a woman, and 25% because he wanted to a. wintess me and other woman , and b. because he really wanted to experience having two women giving him oral at once. As for how frequently....I'll have to keep you posted