I like to use diapers as a deeper adjunct of domination and submission.
To take charge of a woman's bodily functions, often in conjunction with further physical restrictions-locking diapers and plastic panties,padded locking bondage mittens-straight jackets.
I guess I am sort of an odd one-it seems too extreme even for a lot of other pople who are into bdsm. I find it especially charming for a girl to have to beg to have a messy diaper changed-knowing she's only going to have to go through it-yet again. Wonderful humiliation aspects there.
But what is really fun is when she gets aroused by it all. Soaks the diapers without even peeing in them.
As far as baby pictures? I'll tend to look at serious cloth diapers and clear, or snap plastic pants over those. I'm not at all interested in age play-means no sexual fun for me-I'm not a pedo.
Sort of a turn off that way. What I DO like to see is a setup that looks like a woman can be kept in it for a considerable time, with no leaking.
And no possibility of escaping it.