That explains alot.
My 23 month old will not chew food even though he has all his teeth. It has gotten worse lately where he wont even eat foods he has tried and liked before. He will just hold them in his mouth for hours and whine. He is fearful of mealtimes because he doesn't know the textures of what we are bringing out.
He doesn't play with other kids but is very object oriented, picking up anything and holding onto it fiercely. He hates clothes that are binding at the wrists and ankles and will not use blankets or stuffed animals unless they are as soft as possible. He dislikes being outside because of the light.