>>113743403Realistically, the human brain shuts down after, like, a week of sensory deprivation. That's not counting the huge number of physical problems you'd get from being trapped like that. You could probably keep Dipper aware longer if you provided him some way of remaining engaged while he was in there, but you're still just living on borrowed time.
In porn, this kind of thing results in someone being mind-broken into a sex-craved fucktoy from the lack of stimulation and the constant teasing Mabel would inflict on poor Dipper, which is much better, in my opinion.