There are no hairs as such from a dry shaver, just a kind of dust, and you can hardly see it. Scattering it on his food might give me satisfaction but he wouldn't notice it.
However, the shaver has disappeared from the kitchen to the bathroom so I'm assuming once he'd recovered from his sulk over being called unhygienic, he's taken it on board, although I haven't seen him actually use it since.
I was pretty scathing in the language I used because the thought of him doing that made me feel like being literally sick. His family have always used the childish 'silent treatment' to get their own way or to punish each other, he's not going to change now although he's better than he was.
I sympathise with Dickens over the hand rinsing because he does that too. That's partly why I jumped on this new habit right away before it became 'normal'. We now have two hand towels in the kitchen, a dark navy one for him and a nice yellow one for me.
It surprises me to see people (including chefs on tv) using a tea-towel as a hand towel, have you noticed this? But that's a whole new topic to post.