Not a visual contact, but:
I'm a pharmacist and until today i have never met someone that was wearing diapers (yeah there's tons of old folks that probably wear but an elderly person in diapers is more a massive turnoff to me than anything else).
So today i had a customer, 24 years old and quite overweight.
Picked up tablets that help against incontinence.
And she had this smell of pee on her. Not the gross type of piss smell you'd expect from some hobos, but rather a sanitary type of pee smell. The smell of a diaper that has been wet not all too long ago.
On her way out i tried to identify, looked like she wore a thick one underneath, but wore black baggy clothes so i wasnt Sure.
I felt like a sick pervert for a moment, but then realized: i am just that, but i've known that before.