>>102685589Why would you ever do that? How would you eat or drink in there? How would you breathe? Your body would be fucked by square cube law, too. How would you even stay in? Your parents would never find the body, if you died, and had no way out. Plus there's the issue of shrinking in general, that technology is genuinely impossible in real life.
Would you do it for sexual pleasure? But you wouldn't be able to tell what part of the asshole was which. I suppose the smell would be nice if you were into that but it would do some severe damage over time. You wouldn't even be pleasing Stephanie, since you'd be too small. And what about when she goes to take a shit?
Besides all that, the asshole wouldn't be shaped like a canyon. It would be more hilly. How would you even get in there? Would you do it while she was sleeping? Unlikely, considering the security measures Batman has in place. Given she's wearing pants at all times, the best bet would be when she's taking a shower - but then you might slip and fall into the water and drown.
I don't think you've thought this through, anon. I believe that would be a terrible feeling.