AceShowbiz -

David Beckham revealed in a new documentary that he had to endure a humiliating sex act in front of his teammates as a teenager. The soccer superstar confessed that he had to diddle himself while looking at the photo of Welsh soccer player Clayton Blackmore as his Manchester United's youth team jeered him on.

"Everyone had an initiation that you had to go through on the youth team, that was one of the most uncomfortable ones," Beckham was quoted by Metro as saying. "The fact that I had to look at Clayton Blackmore's calendar and do certain things, while looking at Clayton Blackmore. I mean it was embarrassing to talk about!"

He continued, "I was embarrassed when I was saying it on camera let alone talking about it more. But it's something we all had to go through. It was definitely something I wouldn't like to go through again!"

Following the confession, Manchester United player Robbie Savage tweeted that Beckham was not the only one who had to go through the bizarre ritual. Savage also wrote back in 2012 in his column for the Mirror, "Your initiation ritual as a Manchester United apprentice involved being led into a darkened room where you had to pretend to chat up a mop and then get sexy with a treatment table while the other lads giggled in the background."

"So I can confidently say that I'm one of very few people in the world who's has previous experience of hearing Gary Neville make the kind of sound he made when Fernando Torres scored for Chelsea the other night."

Beckham's confession is part of the upcoming "The Class of '92" documentary which premieres in London on Sunday, December 1.