Tom: "Mum, on our allotment, can we plant coca?"
Mum: "I beg your pardon!"
Tom: "Coca, can we plant coca?"
Mum: "Well I suppose we could quickly raise some money to buy a smallholding that way, but I think it needs a higher altitude than we have here in North Cheshire. So no, not really. Why do you ask?"
Tom: "So we can make our own chocolate"
Mum (relieved): "Oh, you mean cacao."