If you’re really interested in non-genital stimulated orgasms, do some research with doctors and physical therapists involved with para- and quadraplegics. Some urologists with experience in severe genital injury may be able to attest to the brain’s ability to re-work the pleasure response. I’ve heard folks with no sensation below the waist can get off by having their heads touched, for example. I do have a (female) friend who can get off by having the fuzz on her upper back and nape touched gently and another (female) friend who can get off by nipple stimulation alone.
Sorry, forgot to include the link.
Psychic orgasms? I betcha can’t guess what I’m thinking about now.