when did u first start stuttering?

when did u first start stuttering? i started stuttering when i was 4. It was gradually. However, some stutterers say they start stuttering in 1 day out of nowhere, and boom it just stuck. A friend of mine started stuttering when he was like 13. He and most of his classmates (in his class) used to imitate this one classmate who *did* stutter, and somehow HE (and one other non-stuttering classmate) ended up actually getting a stutter disorder from that. How did you start stuttering? *Processing img hvvbihnon9ue1...* Source of image: [PDF ](https://drive.google.com/file/d/1oWsY1axxNfpWPpvq5NXMGgV9XkEBezyR/view?usp=sharing)or [Word](https://docs.google.com/document/d/1Jh8vFx5OZDOsquCkDtBJovERVz-nmNdcIax5nT2OnGs/edit?usp=sharing)