quick joke

Last night Nickos asked me to come have a beer with him and so I walked down to the Falcon. Some Czech guy bought me some Czech drink and i started drinking that. Then I picked up a German lesbian in the hallway(she looked lonely) and she came to sit with me and nickos. She had a funny little ring that had a little container which she said back in the day, the ring was used to poison enemies. While we were sitting the Czech guy came back and asked if i was Canadian so I lied and said yes. Then he told us a joke that went something like this.
When an American moves to Canada the national IQ of Canada goes down but also the national IQ of the US goes down because only a smart American would want to move to Canada.
The lesbian girl didn't like the joke and started to banter with the guy in German. I fessed up my country or origin and I think I embarrassed the guy but he got over it and started rocking to some Swedish guitar player who sounded like Hendrix, playing a Bach song on the guy's cell phone.