The October challenge, belonging to the no nut November and destroy dick December challenge family.
To participate one must nut exclusevly to tentacle porn for the whole month.
(The challenge is of a subjective diffuclty level, as one can decide to fap on any kind of Octopus: from the real life animal to anime/hentai versions.
People who enjoy this type of porn must fap only on real Octopus.)
"Hey mark, how is your Octopus Orgasm October going?"
"All good, whent to the acquarium yesterday and took loads of photos"