There may be some truth to Denise Richard's allegations that ex-hubby Charlie Sheen gets down with gay porn.

A well-connected source informs us that Sheen uses the name "Calock (Cal) Bostock" when trolling for homo action. Does it double as his serial killer pseudonym, because it's creepy as shit.

The already ugly custody battle between Charlie Sheen and Denise Richards just got even nastier

In an effort to win her kids, actress Richards handed a judge some less-than-flattering Sheen emails, including one in which Sheen calls Richards a "sad, jobless pig". In addition to the emails, Richards alleges that Sheen's seemingly endless sexual appetite led him to gay porn sites:

Richards says Sheen even visited gay pornography sites - "which I found even more disturbing because I felt that the boys looked underage," the documents state.

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