Using pure capsaicin would be less 'sexual heat' and more 'torturous agony' that no one would enjoy.

I would reccomend against it.

The ball gag probably wouldnt fit due to cocktongue being in the way.

That or they either - cum via their normal genitals, or just cum in their own mouth

Except "animal language" would be largely scent and visual based. A lot of 'vocal' communication for animals is usually mating calls, staking territory, generic threats, etc. Not enough to consist of a full language.

It looks to me to be more like a cervical penetration fleshlight

But the real question is - will you be able to stick your dick in food?