People stutter for different reasons, some people are so close to removing their stutter, that they only encounter stage freight. One thing is for certain, one thought is enough for 99% of stutterers to speak fluent for 10 days. If you have done any kind of stutter therapy that guarantees removing your stutter (and there are at least 10 of them in google) which I participated in, then you'll experience this. ​ All stutterers in the group therapy don't stutter if they 'think' a thought in my experience. The problem: but if you go home after 10 days then you start stuttering. Why? Insecurity so in that sense it's stage freight and respecting yourself as a stutterer. You'll think: 'if I speak without stuttering with my mother, then she will get jealous, so I refrain myself from acting like a person who overcame stuttering'