I think Kos is basically bit of a dork underneath the bravado. he is like one of those people who understands everything except how not to come across as a complete moron.
All his trash talk seems really ham-fisted and is always striking the wrong tone. his mocking " well you are a male nurse" is bit of a nothing insult. "is that the best you can do", was quite a good response. This is not anti kos propaganda I respect him, and he makes a great heel.lol