Personally, I’m not that surprised. For an extremely intelligent creature, spending its entire life in a semi-dark void, eating fish, surfacing to breathe, submerging to find more fish, eating, and so on must become a bit boring. Playing chicken with the bow wake of human ships, jousting with sharks, and occasionally rescuing those funny hairless apes the sharks try to eat, just doesn’t happen quite often enough to relieve the ennui. So taking a few tokes on a ball of neurotoxin could fill in the gaps. If they had underwater saloons they’d probably be found congregating at the bar.
Well, they ARE the most sexually active mammals on land or sea.
They do meet up at The Sand Bar. I saw them when I was cruising by in my Sting Ray.
I had to spend the night in town because the mechanic said I had blown a seal.
Other non scientific conjecture...dolphins play “volleyball” with pufferfish...deep relaxation after game