The son of the late Crocodile Hunter, who stripped to his skivvies for a new Bonds underwear campaign, says his dad would have a laugh at the 'Made for Down Under ads.

As if Robert Irwin breaking the internet with his viral Bonds underwear ad wasn't enough, the son of Terri and the late Steve Irwin once again made fans gasp with behind-the-scenes photos from the shoot.

Robert Irwin, son of late 'Crocodile Hunter' Steve Irwin, is stripping down to his underwear for a new clothing campaign. At 21, he isn't a kid anymore.