BOGOF

BOGOF offers are irresistible and encourage a tendency that I already have... that is... the urge to buy two of everything.

The "logic" goes a bit like this:

I need item X because we are going to eat it/drink it/clean something with it. But when we've done that... we won't have it anymore... but if I buy two...

Add that train of thought to a special offer and hey!

A cupboard full of spares.

Happy Tesco's, happy me!