Dude, anyone who can host without getting stressed is probably either high on something amazing, a Buddhist monk, or someone with a neurological or psychological issue with symptoms involving emotional dampening or apathy.
So joking that I ruined my parents lives in response to my half-assed comeback about me being a mistake is polite? I can see how bringing up your imaginary friends was insensitive after that. I apologise for stooping to rhetoric and sarcasm.
I'm polite as long as you're not a dick to me, I'm usually not as nice to you however I've seen you hold a lot of grudges.