No need. Relying on my years of research, the obeasts are most prone to oinking, fidgeting and squeling while getting tattooed even without the use of jellyfish venom.  Their lack of self control and utter lack of restraint shines through even at times like these.  They are also prone to fake-fainting and demanding a beetus drink to raise their blood sugar. Actually, the semi-fainting might not even be fake. Their bodies are probably at their physical limit so any exertion of energy and/or restraint shocks their systems inducing a shutdown.