Why do some guys put extra letters texting?

I don't know how to explain this but you know when you text and let's use maybe for example, you put maaaybe instead of maybe or reallly or even dooon't. What does it mean? Is the guy excited ot expressing his attitude through those extra letters? I thought girls only did that lol but I guess not. Any suggestions? thx :)
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+1 y
typos sorry!
Why do some guys put extra letters texting?
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