Same. I have 3 older sisters and I'm the only one who stutters. Probably got it from my paternal grandfather who was a severe stutterer. My father jokingly says that he loves my stutter because to him that's proof that I'm actually his biological son lol (yikes). I have 5 nieces/nephews and none of them have any speech impediments either so I guess I really am the only one which does suck but I won't have any children on my own so I'm glad my grandfather's stutter genes will die with me