Tom Felton: Off Color Word Censored, ...But What Word????

[Steve]

In a recent interview, Tom Felton said he would have no objection
to stripping off for a movie or stage role if it had artistic 
merit.

But in the quote, there is a word that has been censor and I 
suspect it is a British word for a private part of a man's
anatomy, but for the life of me, I can't imagine what the 
word could be.

Here is the quote -

"I would [get naked]" Felton told DS. "If getting my k**b out
came with some artistic merit and the role required it, 
I'd do it." 

http://www.digitalspy.co.uk/showbiz/a129010/potter-star-happy-to-do-naked-roles.html

So, "K**B"; starts with 'K' and ends with 'B', but not sure
how many letters in between. 

Could anyone tell me what the word is? Of course, I suspect
it is a word unique to the UK so it wouldn't be offensive in 
the USA. If it is offensive in the USA, or is too 'delicate'
to mention here, could you drop a hint or two???

Just curious.

Steve/bboyminn