"He behaved like an ostrich and put his head in the sand, thereby exposing his thinking parts"

This quote is referring to someone who is preventing a problem or situation by pretending it does not exist. The metaphor of an ostrich burying its head in the sand is used to show this behavior. The phrase "thus exposing his thinking parts" implies that this person is not utilizing their intelligence to deal with the concern, but instead is picking to ignore it. This quote is recommending that this person is not being proactive in dealing with the issue, and is instead choosing to stay in a state of rejection. This quote is a reminder that it is necessary to face our problems head on and not to bury our heads in the sand. Disregarding a problem will not make it go away, and it is very important to be proactive in order to find a solution.