The former Jackass funnyman was reported to have romanced the reality TV beauty on the set of the movie remake - despite the fact he's married to Melanie Clapp and Simpson's married to former boy band star, Nick Lachey.
And Knoxville--real name Phillip Clapp--admits the tales have had an affect on his marriage.
He tells the New York Daily News, "I guess I'd have to say she's standing over me right now. No knife. But she does wield a mean pepper spray."
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