Charlie Sheen's sperm has always been in high demand... so to speak.

But never quite like this, or so the actor claims. Sheen is taking his custody battle with Denise Richards to the airwaves, telling ET that his ex-wife asked him for a sperm donation.

In an interview set to air today, the Two and a Half Men star says reports that Richards wants more children fathered by him are true.

"There is documentation that I'll show in court revealing the request for my 'donation,'" Sheen says.

On Monday, the New York Post's Page Six reported that Charlie Sheen is seeking to amend his custody pact with Richards in a Los Angeles Family Court.

According to the Post, he'd like a looser custody agreement that would allow him to visit with his daughters Sam, 3, and Lola, 2, without the supervision of Denise Richards' nanny.

The actor tells ET, "I can't be monitored anymore. The type of household that [fiancee Brooke Mueller] and I provide, we should be able to decide if we need help or not."

In addition to unsupervised visits, Sheen said he'd like, "an extra weekend per month, the ability to hire my own nanny or child care provider and no phone calls to the house unless there is a medical emergency... I don't want to interrupt my time with the girls."

Of his ex-wife's seemingly contradictory actions, Sheen pointedly asks ET, "I'm good enough to provide DNA but I'm not good enough to hire my own child care provider?"

As for whether he'll grant Richards' "request," Sheen adds, "I would sooner walk on the surface of the moon in exactly what I'm wearing."

Alright then. Well, Denise, if you get desperate, you can always hit up Kevin Federline. His boys can swim, let us tell ya.