1. as long as i can remember tbh. i think it really kicked in when i was about 7. 2. yeah kinda. my older cousins ripped me apart about it when we were little lol. even now at 17 i still get the odd mimicking from ppl at school. get some off my mum too. 3. dont have luck with that anyway lmao but i dont worry about it 4. be patient with him. dont cut in or finish his sentences. or make fun of him. and teach him not to give a fuck about what other people think. ik hes a toddler but try to get that in him sooner rather than later. will help a lot in life. ​ i hope this helps :))