This is a reference to a scene from the Michael Moore movie Bowling for Columbine, where he is walking in a Canadian neighborhood and just opens the front door of someone's house. I couldn't find a better clip than this one: https://m.youtube.com/watch?v=pjJbtb4Bs0Q
Huh, never lock the door when I'm in the house, except at night ... is that unusual? Live in a smaller UK city. Perhaps if we had anything worth stealing it'd be different.
Is it perhaps the US Americans are the peculiar ones and other countries are more like Canada?
For anyone wondering, the name is not a result of a mistake, apparently 'beta' was commonly transliterated as 'b' in the past (as opposed to 'v', the sound that it stands for).[1]