Intermediate sexuality and grey tantra

In the Perfect matrimony, VMSAW uses the term “intermediate sexuality”. He only gives a negative definition of this term, as the mirror opposite of Lilith infrasexuality. He doesn’t elaborate further on this mysterious class and, to my knowledge, never uses the term in any of his subsequent books.

I am wondering, what are the sexual habits of intermediate sexuals? Prior to listening to the 2020 lecture on sexual transmutation I intuited that it referred to Taoist masters who are able to have non-ejaculatory orgasms, but the instructor stated emphatically that such individuals are black magicians.

My second thought was that it may refer to married couples who practise techniques like Karezza, which I understand to be sex without orgasm that does not have as its object the elimination of the ego. If this is incorrect, the only other class of people I can think of are bachelors who have perfect chastity.

My other question concerns the term “grey tantra”. Like intermediate sexuality, this term is not really explained by VMSAW. I have always assumed that it referred to Taoist sexual magic, to techniques like Karezza, and/or just lustful sex between married couples without orgasm (as opposed Nahemah infrasexuality which I understand to be lustful but non-fetish sex between unmarried people with or without orgasm (?). Could “grey tantra” possibly denote lower-intermediate sexuality and karezza upper-intermediate sexuality?

Any insights would be greatly appreciated.