Alright we all know how hard it is to come to terms with our feelings, but we also know how they are so many people out there that have feelings they repress until it's unhealthy. So just think maybe they are many people out there that have these desires but don't act upon it because they don't know what it's called or just don't want to admit it to themselves... maybe they are truly more of us then wek now. How many times have people said "to be young again" or stuff like that. Currently american society is fascinated by youth, we want to be teenagers well into our 40's take a look at Britney Spears! Take a look at all the college kids and what not most of them are acting like they acted when they where 15, crazy, partying and what not. So what's not to say that they are "regressing" to a younger age.... Many people in that regard regress just to a different age.
Lets look at it from a different perspective, how many times has your parents or aunt or uncle sat down and watched old cartoons. My parents do that every so often they watch cartoons of when they where younger. They reminisce about it and talk about how awesome they where.
Lets look at it with this theory, regression seems to be all around us, people use it daily, maybe we take it a bit to the extremes but maybe some of the people wish to be treated like a baby, look at the richy rich people, they are fully pampered and do nothing for themselves, that is essentially a form of regression to an infant state in a way. So I'm thinking this whole regression thing is normal just how far you take it is what changes. So maybe some normal people want to go all the way... like richy richs or us.... Just food for thought.
NOTE: By Out of the closet I mean fully accepting of who they are and have told a close friend (online or offline)