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Charlie Sheen is revealing the reason he first turned to booze -- and it wasn't for partying -- instead, he says it was to help "soften the edges" as he battled a lifelong stutter.

He talked about leaning on alcohol in 1999, when he landed the sitcom "Spin City," and worried about the stutter impacting his starring role on the show.

Charlie was on Monday's 'GMA' discussing his addictions -- to alcohol, crack and more -- but says liquor helped achieve a sense of freedom with his speech.

While he didn't spell it out, Charlie seemed to insinuate he was drinking on the job to cope with his stutter while shooting "Spin City."

He told Michael Strahan the lesson others can take from his story is to realize it's okay to ask for help ... NOT that they should use alcohol as a crutch

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