>>9907120You could likely call it a marriage/making a contract.
The words used to describe the Daemons/Devils:
Incubi/Incubus = the ones on top (male)
Succubi/Succubus = the ones on the bottom (female)
... there's also likely a component of "riding a broomstick", rubbing what's on it in to your mucous membrane to get high without getting a deadly amount of poison into your system.
Creating evidence of activity that could be easily misinterpreted even if there was no literally daemonic contact ...