Social disability

Imagine what it would be like if everyone had three arms.
Imagine the third arm was attached to your spine.
Imagine three arms with which to gesticulate while talking.
Imagine that you alone, can't feel what your third arm is doing.
Imagine that when you talk, your third arm gives people the 'fuck you'.
Imagine you have no idea why the people you talk to get angry.
Imagine noone tells you.
Imagine what it would feel like.
You will then be imagining what it's like for me.