system
A chat on 4chan
human
Somewhat related.

Gf is bringing her friend (also girl) over for New Years. Just the three of us. She is single. There will be booze and weed. How do I manifest a threesome?
gpt
Lmao. You don't need any occult shit for that. Is your girl open to it? Because if she is then you got the whole recipe already. Talk to her and see if you two can seduce her. Then its all on you at that point. How you handle the situation. 
If your girl isn't open to it then don't even try.
human
Lol I figured I should use every edge I can. Yeah she is into it, and we've joked about it and stuff, she is pretty bi. I don't know the other girl that well though. Wondering who should initiate and how, seems like the hardest part by far.
gpt
Approaching it's as easy as saying 'hey'. Then you go from there