I did that, and he moved and scuttled about in a daze as if he didn't know which of the other 3 seats he should sit in. It just irritates me that he truly doesn't recognize simple social cues. Another example: One time DH had to go to the hospital for a regular procedure (radio frequency ablation) in which they put him under general anesthesiology and give him pain medication to deal with recovery. He is always out of sorts for a couple of days.
Well, one was scheduled when I had to be out of town. So DH reluctantly asked BIL to take him to the outpatient surgery department. What could go wrong, right? All he had to do was drive DH to the hospital, wait, and then drive him back home.
I was in the middle of back-to-back interviews when BIL called to say that he had brought DH home, but that HE felt that HE needed to go to the hospital because now HE didn't feel well (unspecified). I told him to call Uber.
Later that day I learned that he had ASKED DH to take him to the hospital!!! Didn't he realize that we asked him to DRIVE DH because DH COULDN'T DRIVE???
With pain medication approaching its half-life, DH drove his brother to the hospital. BIL never asked DH once how he was feeling. All he did was freak out about his own situation (turns out he had very high blood pressure and he was in the hospital for two days).
Again--it's all about him.
Regarding the plating: I made him dinner because we happened to have a lot and I didn't want a lot of waste, and I was actually plating ALL of our dinners.