CP&B who are handling the stunts for the Young Gun awards these came up with this campaign, real young creatives pose nekkid holding up their best work to cover their naughty bits at hardly-legal.com/.
A few - if not all - of the young hot creatives featured on the site were at one time interns at Crispin.
The sex-thing might be a little tired, but the reasoning could be that the young target won't know it is. ;)
Some cred: Tiffany Kosel (AD), Jed Grossman (AD) and Kevin Koller who came up with the concept.
Our friend in the field said: ...the poster arrived in a plain brown envelope - to mimic adult magazines. except on the envelope it read, "this contest is not intended for adults over 30".