Thank you! That was a lovely surprise :) I dropped into my girlfriend's house to check the net as I'd invited a couple f people to my firepit gathering who don't have my phone number. It's shaping up to be a great day )
Being left-handed, I love that you were the one to gift me my birthday wish given sinister comes from the latin word for left hand sinestra :)
My pleasure, and very cool about the "sinister connection". The old left/right terminology of sinister/dexter also shows up in the world of heraldry. One thing to look for on a coat of arms is the "bar sinister", a left-diagonal stripe. This indicates the noble is a bastard by birth.
This in turn leads me to the old Underdog cartoon show. His nemesis was a mad scientist named Simon Bar Sinister. So now that you know what the heraldic term means, you know that the cartoonists manage to sneak into a children's show a villain named Simon The Bastard. :D
Anyway, enjoy the birthday festivities!