Elmo gets cheeky.

Does My Bum Look Big?

Experts are launching what is thought to be the world's first scientific study into how clothing can affect the appearance of the female rear.
The team from Heriot Watt University's School of Textiles and Design in Scotland believes the study could have major implications for retailers.

Female volunteers wearing hundreds of different types of clothing will have their rears photographed for the study.
Participants will then be asked to look at the pictures to assess how big or small each model's backside appears.