Do You Know Anything About Astral Travel?

There was some suggestion that in the House of Hidden Light, he's talking about potentially having sex with Prater natural beings. Do we know anything about this stuff or is this just kind of rumor? Well, I think the person we know most about this is from Mod Gone. She was a member of the Golden Dawn. And at one point, she had lost a child and it was buried in a mausoleum in Paris.