I have suffered the dark side, more like a brain shut down if I try and avoid letting myself slip into an infantile state or try to ignore it.
I've spent nights trying to get over the whole kicking in of the urge. The guilt and hate factor.
Ignoring it actually brings it to the surface more, both in how I act, speak and think, making me feel dozy and lathargic, mixing those two elements with depression is a killer and something I'm glad I haven't experienced too much of. Finding a balance is key.
The best advice is to really be open with yourself, do what you have to do and enjoy it as much as possible, but do it in moderation. I'm lucky enough to get support from my girlfriend with this issue, though my family is still unaware of my infantilism.
Saying anything or admitting the psychology and needs behind it sometimes locks me up, and it did lock me up a few times telling my closest friend and girlfriend, where you can feel like you're in an abyss trying to shout out the words in your head hoping they'll hear them.
The humiliation can be embarassingly funny in retrospect, well, the whole nappy thing is funny because even though it means a lot to me and others with the same mind-set, as long as you can get yourself to laugh about it afterwards, you realise that it isn't such a big deal.
Living at home with parents is a problem, but I hope to move out with my girlfriend sometime next year, then things will definately flow a little easier (forgive the pun hehe).
Love yourself, and your nappies,
DuckyDoc.