Robert Irwin stripped down and turned up the heat in a steamy Bonds underwear campaign. Robert, 21, who is the son of Terri ...

Steve Irwin’s 21-year-old son Robert Irwin stripped down and showed off his six-pack abs in a steamy underwear campaign for the Australian brand Bonds.

The 21-year-old son of late “Crocodile Hunter” star Steve Irwin went shirtless for the photo shoot, baring his abs in nothing but variously colored boxers.