Cousin/Nephew/Goofball?

Now some of you readers (all five of you) might be wondering how Kurt and I are related.

Alright, actually none of you really care, but I'm going to tell you anyway.

I believe Kurt's Dad and my father are first cousins. This means that his Dad and mine have the same grandparents. That makes Kurt and I second cousins because we both share great-grandparents. This makes my young boy Kurt's second cousin once removed because he is one generation removed from Kurt.

How do I know this absolutely silly minutae? I read this.