Bindrim gathered patients together, sat them in a circle while nude, and told them to "crotch-eyeball" (his actual term for the treatment) one lucky participant who laid in the center with their legs in the air. This could go on for up to 36 hours, while Bindrim lectured the group about the genitalia and anus, pried personal stories of sexual failure out of everyone, and pressured them about how repressed they all were.
If staring at a random stranger's exposed fun bits for over a day didn't cure you, worry not -- Bindrim had other aces up what we can only hope was his sleeve. He also encouraged patients to talk to their own genitals. He told one patient to explain to her vagina (which was called "Katy," for reasons tragically lost to history) what generally goes on in her crotch region: "Say, 'Katy, this is where I s**t, f**k, piss and masturbate.'" An embarrassing silence later, the patient replied: "I think Katy already knows that." Oh, and sometimes he made male patients beat the hell out of benches while imagining the benches were women who had failed to give them love.
"Katy, this is where hobos s**t, f**k, piss, and masturbate!" they'd yell.
Bindrim's techniques weren't purely for pantsless amusement. They aimed to regress the participants back to the source of their trauma, and produce strong emotions which he called "peak experiences." His methods even received positive press in the 1960s and 1970s, though the media would eventually turn on him. See, although Bindrim was a qualified professional with full academic credentials, he also had a keen interest in parapsychology, and was an ordained minister in the Church of Religious Science. When he eventually got bored of commanding naked people like a dong hypnotist, he switched to "aqua-energetics," a process wherein he used water to suck away negative life energy and improve health. This is a process modern science refers to as "bullshit."