Orgy that includes a creature of myth or nightmares that has tentacles. A qualifying creature must have at least 4 tentacles. An example would be an octopus or kraken.
"I’d just had a tentacular orgy in a car beside a road, with vehicles whooshing by… This relationship was so complicated, so twilight zone, it needed an index and a map."
by reader of F March 21, 2023