apparently he was balls deep into the occult, he did a bunch of weird rituals with L Ron Hubbard with the direction of Aleister Crowley called Babalon Working
they tired to summon a woman (divine feminine called Babalon) to partake in sex magik to conceive some bastard demon child. they met a woman who fit the bill and performed some rituals but failed ultimately
L Ron ended up running away with Jacks wife and stealing a bunch money off him. (needed some funds to start scientology i guess)
Then a couple years later Jack blew himself up in some weird lab accident.
He did gay stuff with Crowley.
There's no evidence to suggest they ever met in person
Maybe. He did join Crowleys gay thelemite club as well
lololol wouldn't surprise me