In the mind of the Donk

[QTip]

Schoonmaker talks about getting to know the different types of opponents to understand why things make sense to them. So, I see this play quite a bit from donks, and I'm trying to figure out why this makes sense to them. Here's what I see a lot of:

I have something like KK and raise PF after they've already called with trash, they call for 1 more.

The flop gives them something like an OESD. They check, I bet, they call.

The turn gives them the nuts. They check, I bet, they call.

The river comes and they bet.

What are they thinking?