Whoa.... That was strangely odd, and yes sadly it's getting more frequent.
And thank you wig you wrote what I can not write due to not not being articulate as your self with words.
With my Nephew Connor he can have conversations with you but only if he wants to talk to you. You have to catch him at the write time, normaly he loves his auntie Lou Lou and won't leave me alone

normaly makes me laugth by telling me he wants to kiss me to death and marry me

But to me he's adorable but I don't see the angry side off him that my sister and brother inlaw have to deal with, I only hear about it. and they must be a very stronge couple to be able to cope with him and bring him up at a mainstream school also he's younger brother 6 and a baby sister. Nearly 2.
My connor is also the same and gets very frustrated with him self and often talks about not wanting to be with anyone and not wanting to live and that everyone is out to get him, and oftern uses very long words which for anyone who hears it or hears about it would be very upset. So I would never understaind what he is going through.
He Does not understaind feeling, Me and you would want a cuddle to say hi he in his way would ether not wans anything not even eye contact or he would squish you so much that you could not breath ( I love this)
he also does not understaind Face expressions, and has too look at you when your talking to hear you and maybe understaind you. He may even hold your face while you talk and stair at you.
So life in this little boys world is far more scary than in a life of a fully understanding adult. With the normal day to day problems we face.
They most deffinatly understaind more than we know well said Wig