BBC Three has commissioned a documentary from Firecracker Films which considers why men don't talk about their genitals, even with a growing industry in penis extensions.

The hour-long programme, My Penis and Everyone Else's, will be aired as part of the channel's Body Image season on September 3 at 9pm.

Lawrence Barraclough, who directed the BBC Three film, My Penis and I - shown in 2005 - has also directed the new documentary.