Now that I find myself living in S.A, I have discovered you can buy packs of Mars Bars from the local supermarket. They're a lot more fucking expensive than I remember when I was a cub but the exquisite flavour has not diminished, especially when accompanied by a mug of tea.
Back in the day, when the grocery van came round our square, we normally had to go for the Milky Way (think it was about 10p) as the Mars Bar was considered a fucking luxury, weighing in at roughly 16p. When one was fortunate enough to have the necessary funds to purchase one, one had to take drastic measures to enjoy the tasty chocolate treat in peace. You normally had to do one of the following:
find a quiet place and eat it like you were having an affair with a friend's mum
spit on it to deter the vulture cunts that were your mates (wasn't always effective)
It's also worth pointing out that any chocolate bars/sweets over the average price had to be treated in the same way (Rolos, Lion Bars, Cream Eggs, etc.)
I recall one particular Saturday morning, I must have been 12 or 13, when I had enough coin to purchase a Mars Bar. I thought I had bought myself a couple of minutes to eat the bastard in peace when, much to my shock, one of the older boys (yes, you D.Vennard) wrapped his hands round my throat to prevent me from swallowing it. I think the fuck would actually have eaten the regurgitated product had I not repelled him.