Hands up everyone who has received an advertisement for libido enhancers, or found themselves sucked into an infomercial on TV promising huge weight loss in an astonishingly short space of time. Or an ad for a miracle cream that will stop ageing, or to take pain away, to name but a few of its uses. Curing baldness is probably also on the list.
Think about it for a moment. These products are riding the wave of peoples' fears – no one wants to be fat, flabby, be in pain, have cancer, have a small penis (if you're a man) or a flat chest (if you're a woman), or look old. So we're receptive, and someone's making a lot of money.