This thread is super long and I can't be bothered to read through all 137 pages to see if this has already been said before, so if it has been said before then I apologize.
In the game South Park: The Stick of Truth there is an entire level that takes place inside of someone's ass, so anyone who is a fan of M/M anal vore (which I personally am not, but I know some people are) then I'd highly recommend checking this game out. It's also a really great game in general and well worth playing even if you aren't a fan of South Park, IMHO.
It is a real shame in my opinion that this was M/M and not F/M, but I guess there's a bit of a double standard where something like that inside of a male's ass is considered comedy, but if they did the exact same thing but inside of a woman's ass then it would probably be considered sexual and the game would have been forced to have an AO rating.
But if you are okay with male anal vore stuff, this is probably the best example (probably the only example, actually) you'll find in any video game, so check it out if you are, and also like I said its a pretty cool game in general.