>>16254815(Non-english fag here)
I think this is a very complex fetish. For me i like those things:
-"feeling of security" (even with a clean diaper)
-"Baby-perspective" (no need to care about the adult-world, with all the problems in it)
- smell of urine
- humiliation (the whole thing is very BDSM related)
- Anal Stimulation