When I was younger, I loved Chewits. Each parcel of chewy sugar threatened to tear out a tooth, but their punch of strawberry, blackcurrent, and orange flavour was hard to resist. Left to my own devices, I would take packs of Chewits, unwrap all the sweets, and press them together in the palm of my hand until they formed a single Chewit boulder. The different colours and flavours became indistinguishable but the sheer size and density of the thing was…