Just reminded me of the possibly the least useful and most obscure niche market cosmetic I saw on an advert recently:

A woman runs upstairs on an escaltor, in a mall, wearing sling-back shoes. The camera zooms in on the back of her legs. The voice-over says something like (I was so gob-smacked I couldn't really take it in):

"Embarrassed by dry and cracked heels? Now there's a new treatment ..."

I do SO hope their product is successful.

What next? - "Ever wondered just what the circumference of your knee is? Now you need wonder no more ..."

>... need this:
>
>http://www.amazon.com/gp/product/0972055347/104-8892426-5958341?v=glance&n=283155