My husband is a baby?

I was cleaning my house yesterday, and found a bit stack of diapers and a pink baby dress hidden inside my husbands drawer. Everything is adult-sized. His on business trip until wednesday, but I�m a bit grossed and freaked out abou what I saw.. Is it like a paedophilic thing? Because I won�t take that. (we have a 6yrs old daugher) I need to approach him about this, but not sure how to start... Why does a 56 year old man has adult sized Hello kitty diapers and a frilly pink dress?? What do I do