Why do I keep seeing little piles of CO2 syphon capsules when I'm out and about? I can't help but think it's some teenage thing, but I really don't know what. I'm sure they're not all getting busy with their fizzy Soda Streams so what are they doing, have they found a way of sniffing the gas, are they using that pent up pressure to facilitate some high speed buggary or is there a more innocent explanation?
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