A woman on the left, a guy on the right, both giving each other "the look of love" - it's the perfect formula, and one that has been used countless times in advertising. I suppose it’s supposed to indicate sweet, sweet lovemaking is about to commence, and therefore we subliminally associate the product with getting laid. I’m sure it’s effective – we are an easily duped animal. Here’s a stack of vintage adverts employing the formula beautifully…