At least he has something to stare at now when he doesn't actually want to be involved in whatever conversations going on around him. Picturing him with his arms crossed and a serious look on his face, just STARING at you while you bustle around and shop for groceries. You've already stacked up quite a few things in his lap, necessities plus a couple snacks you insisted on. He doesn't mind holding stuff, even though he always complains about basically being your shopping basket. It gives him things to fiddle with when his hands are feeling particularly restless.
Someone tries to get his attention, an ignorant customer asking what happened to him. How he got his scars, what he's doing parked at the end of an aisle? It happens, people are exhausting most days. It's fine when kids ask him, they doesn't really understand social queues yet, but this is a grown ass adult, crouching in front of him to ask him questions like he's some lost toddler. "It's none of your fucking business," he hisses through gritted teeth. Craning his neck, he tries to go back to following your ass with his good eye. "Do you mind? You're ruining the view, fuckface."