" What height is this table?' he said suddenly, just as I was about to go to the bread bin for a slice to wipe my plate with. I turned round and looked at him, wondering why he was bothering with such an easy question.
'Thirty inches,' I told him, and took a crust from the bin.
'Wrong,' he said with an eager grin. 'Two foot six.'
I shook my head at him, scowling, and wiped the brown rim of soup from the inside of my plate. There was a time when I was genuinely afraid of these idiotic questions, but now, apart from the fact that I must know the height, length, breadth, area and volume of just about every part of the house and everything in it, I can see my father's obsession for what it is. It gets embarrassing at times when there are guests in the house, even if they are family and ought to know what to expect. They'll be sitting there, probably in the lounge, wondering whether Father's going to feed them anything or just give an impromptu lecture on cancer of the colon or tapeworms, when he'll sidle up to somebody, look round to make sure everybody's watching, then in a conspiratorial stage-whisper say: 'See that door over there? It's eighty-five inches, corner to corner. ' Then he'll wink and walk off, or slide over on his seat, looking nonchalant. "

― Iain Banks , The Wasp Factory