My partner whined about how much space my knives took up for a long time and I tried to convert her. She always used a kyocera ceramic santoku (colourful), so I thought I'd ease her over starting with a matching sized santoku in blue #2. She tried to use it one day when I was watching TV--perhaps to surprise me. The knife cut well--way too well, and sliced way too cleanly through a green pepper--she was totally unprepared mentally and physically, probably exerting way too much force both on the knife and the pepper. The pepper collapsed, her grip followed, and the knife cut a bit into the side of her thumb. which I'll not be able to forgive myself for.
That knife is sealed away in a cabinet now and I keep my other knives in a designated corner of the kitchen which she does not approach.
Like some others have mentioned, I think sometimes its wiser to just let it be.