Inserting animals into anus - any non cruel options?

[FreeEelEstate]

There are plenty of video of everything from eels, leeches, roaches being shoved up someones ass but the animal always dies, either they are already dead or they drown/suffoate and thats horrible.

Are there any animals that can actually survive inside a humans ass aside from like tape worms...
Or protect them, like fill myself with saltwater and be a human fish tank for a few minutes.

I love the idea of an animal like a snail or eel slithering around inside me but i dont wanna hurt or kill them.

 

[Pillar]

These are one the topics that are not allowed for discussion - they got a list for that.

Edit: Number 3.

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[Oldman]

There, 2 good answers. Don't ask again.

 

[pes]

Buy a rubber snake. That is the only non-abusive option.