This is strictly fantasy, although it had its roots in a sorority initiation I underwent back in my college days in the early seventies. (And, no, I'm not going to tell you that that initiation was, because it's a secret! But suffice it to say that it did have some mildly sexual content, not quite as extreme as in the story. Of course, we didn't have a statue in the basement, either. If we had, you never know ...)
I'm probably going to get complaints that there isn't enough sex in story, or that Priapus doesn't become alive due to some spell being broken and go on a rampage, or something else. Sorry, but I wanted to keep it as realistic as possible, the sort of thing that stays within the bounds of what is not only possible, but plausible. And the story is really about Ginny's sexual re-awakening, not the restoration of the initiation rite. It's about the value of tradition as a means of connecting with past ages. Ginny rediscovers her sexuality only when she rediscovers her past. But I'm sure a lot of you have figured that out already.