It strange, Amstaff owners I know would say the same thing!
Being around both I am struck by the similarities between them.
A small dog doesn't fit my life style right now
but I can see as I get a bit older and slow down
that a JR would be a very desirable companion dog.
One thing JRs and Amstaffs seem to share is an uncanny ability to perceive precisely the time to lick to coincide with that off guarded moment when your mouth is open a crack.
You are absolutely correct about that one. :^)