WATCH: Robbie Williams tells the most bizarre sex story on Graham Norton

The 42-year-old was chatting about his former rebellious days before leaving everyone speechless as he told a very NSFW story.

By Anna O'Donoghue

Last week we welcomed The Graham Norton show back to our television sets with open arms and to make it even better, guests such as Justin Timberlake, Anna Kendrick, Daniel Radcliffe and Robbie Williams were there to open the news series with a bang.