Just a fellow who is turned on by diapers sometimes. I can't wear them myself, as I still live with my family and I don't want to risk getting caught, but I'm still able to look at others wearing them online.
I also have a way of expressing by ABDL nature via 3D artwork, where I just use a random nude human model wearing nothing but a biker helmet and diapers and just figure out some fun ways to present it in!