There's always a kid at school who's got at least two webbed fingers. It's a fairly minor quirk of evolution and completely innocuous, but it becomes somewhat of a fascination to everyone. And in particularly boring geography lessons all you can do is stare at this webbed fingered entity and wonder if their mum had a bit of how's your father with a frog.
And it's this lurid obsession with the abnormal that leads to a grotesque desire to shine a light on these harmless souls. Way back in the olden days the freak show was a popular carnival treat which promised to highlight the rarities of Mother Nature's hand, but it's not the olden days anymore, so TV reigns supreme. Hence the endless glut of shows on Channel 4 and Channel 5 which propose to document the lives of people who are physically unnatural in the eyes of a perfectionist society.
It's a fairly modern phenomenon of the TV schedules and one that don't seem to be going anytime soon, so it's ripe for lampooning and satirising. And that's exactly what Alice Lowe did in LifeSpam: My Child is French.