I'd like to clear the air.
In my opinion, it's as appropriate to spank an adult on the bare bottom as it is to spank a child.
When a parent spanks their boy or girl on their bare bottom , it should be of no great surprise that they desire this for themselves as adults.
In part, because it became a form of self discipline; associated with care and positive results and yet the way it's carried out is as private and unique as they are.
What was good for the child, is now good for the adult in the same ways and for the same reasons.
Age is but a number after all.
My All Things Spanking Interview