Hold your nose next time you go shopping!

Psychologists have found that appetite-stimulating smells (that's chocolate, of course) induce people to seek short-term gains on unrelated purchases.

In a Singapore-based study, chocolate-scented candles led to female participants being more likely to make an unplanned purchase of a new sweater, even though they were told they were on a tight budget.

So next time you find yourself in a shop thinking, "Mmmm, that's a nice smell, I think I'll buy a new jumper". don't say I didn't warn you :-)