Charlie Sheen on Leaving Twitter: It Was Never My Idea to Tweet (VIDEO)

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Charlie Sheen shocked his millions of followers late last week when he abruptly decided to quit his uber-popular Twitter account. So, why the heck did he do it?

“I got tired of saying the word [Twitter],” the 46-year-old star of Anger Management quipped Monday night on The Tonight Show With Jay Leno.

“It was never my idea [to tweet] in the first place,” he elaborated.  “I had [set] a couple of world records [when I joined] … I should have just left it there and gone about my business.”

Now that he’s been off Twitter for a few days, does he have any plans to return?

“There’s a 30-day window to get it back, or someone could buy it,” he told Leno, without really implying one way or the other.

Also last week, Sheen made headlines when American Idol executive producer Nigel Lythgoe quipped that he wanted Sheen to fill one the Idol seats vacated by departing judges Steven Tyler and Jennifer Lopez.

Asked by Leno whether he would join a show like Idol, Sheen quipped, “I had never thought about it. I heard it on the news … so I came up with my terms, and I published it. I’m waiting to hear back.”

“I think I could be helpful, give these kids some guidance without leading them to suicide,” he added.

On a more serious note, Sheen announced Monday that he would be donating one percent of the profits he receives from Anger Management, his new FX sitcom, to the United Service Organizations (USO), for a minimum of $1 million.

As Sheen told Leno, the decision derived after the USO approached him with an idea to name a TBI (Traumatic Brain Injury) Center after the former Two and a Half Men star.

“[So I said], How about I give you something that could be an asset that grows over time, which is one point over time? … It should be worth a minimum of $1 million, and hopefully a lot more than that, because these guys are the real heroes,” he told Leno.

Anger Management airs Thursdays at 9:30PM on FX.

For more on Charlie Sheen, check out his interview with Leno, above.