Copyranter spots it:

How's this for invasive advertising? Superette, an Auckland boutique chain, wanted to promote a short shorts sale. From ad agency DDB Auckland's press note:

"We put indented plates on bus stop, mall, and park benches, so that when people sat down, the message was imprinted on their thighs. This meant that as well as having branded seats, a veritable army of free media was created, with thousands of imprints being created and lasting up to an hour."

Pretty clever though.