I think about this and decide there is no way someone is going to open up with a 60% of their stack bet when they know they have the nuts and will prob get no action. I rule out big pockets as no raise pre flop (not that that bothers me at this point) and put him on two pair or trips at best, poss with a 4 card flush draw. So raise him all in.
You're over thinking. They can and will bet 60% oif their stack and hope for action. They don 't expect anything.

-'rilla