The term man-baby doesn't refer to someone who is secure and experienced enough with his sexuality to wear adult sized replicas of the classic 1990's pampers to bed every night.
It refers to someone that covers their walls with shit like this. Also, only man babies think it's appropriate to keep their fetishes in plain view for anyone that comes in to see it.
Ponies are horses, not all horses are ponies.
I love it how he says he has no diapers and then immediately opens an empty drawer to show us the lack of diapers in that particular empty drawer. I'm pretty sure this guy is a troll, and also wears diapers.