Last night, it was economics, thanks to 24 Hours from Tulsa.
In the mid-1980s, a petrol, or possibly oil, company had a tv advert to promote its reward card. Everybody used Green Shield Stamps back in them days, so although the reward card scheme was identical to that, racking up points in return for paying for petrol, there was obviously some need to preach to the suspicious who were not sure about a plastic card versus tiny slips of gummed perforated paper that you were supposed to lick and stick onto a cardboard...card. (In reality Green Shield stamps just got lost in the glove compartment or were whipped out of your fingertips by the wind as you crossed the garage forecourt to your car. As a kid, I found it hard to get a handle on the Green Shield stamp. It was so important, because it was like...money. But they were always crushed and coated with mud in the footwell, or dinged to shreds in the ashtray, and the card was never about, and then sometimes you would find one among the pile of parental pocket change on the sideboard, and...wonder).
So. The petrol company (I googled it; it's Mobil) did this advert about the things you could get with your points, and the song went: "I was only 24 toasters from Scunthorpe. Only 6 double beds from Torquay".
Now, we all know, until very recently at least, supermarket points things - aside from being calculated to confuse foreigners - buy practically nothing until you have been accumulating them for four hundred and ninety years, and then your options are an acrylic tumbler with the supermarket logo on, or a keyring. (The reason they are meant to confuse foreigners is the way you are asked for the card relating to a particular points scheme when you try to pay for things. It's not a quesion, as in, 'do you have a Nectar card?' The cashier just says, 'Nectar?' - or here, 'Optimum?' If you are confused, or are foolish enough to ask for elaboration, it is customary to simply repeat, 'OPTIMUM?').
So to reach even ONE toaster, even a hundredth of a double bed? You would surely have to drive a considerable distance. Yet the singer is in a car, 24 toasters away from Scunthorpe. And six, count them, six double beds from Torquay.
You're wide awake now too, aren't you?
The furthest point in the UK from Torquay has to be John O'Groats. Torquay is way in the south west. It's only about 100 miles from there to Land's End. The driving distance from John O'Groats to Torquay must be something just over 620 miles.

If I can earn 6 double beds from driving 620 miles, then...I can get a bed for going about 100. I could drive to London from Leicester, and I wouldn't even have to go back.
Mobil, I didn't take A Level Economics. I didn't even take GCSE Economics. But even I can see that's financial suicide on your part.

