Hello, Vulgo!
In my case I did not perform any ritual, it was a spontaneous incubus. Sometimes it can happen. However, if you are looking for a ritualized process, you have this very useful link in this post:
Incubi and succubi have been relatively common throughout history for centuries. There are many documented cases: some are invoked through a ritual, others are spontaneously attracted to you.
Don’t worry about the PMs, when you have interacted more in the forum and have introduced yourself, you will be able to send them