My dad eats cat food. Technically it's not his fault. My sister just happened be to around one day and she mentioned that cat food has a lot of vitamins in it, which my dad took as absolute gospel to try a bit. My cat Ninja is a bit of a fussy eater, and mostly she just eats those whiskers singles, which I can now pass on are like soggy cat biscuits in sauce. I have a feeling that was a once off. But when Ninja got some kitty treats for Christmas, Dad had to try those too, to see what all the fuss was about.
As long as he doesn't encounter any new varieties I reckon it'll be ok, it's more out of curiosity than as a meal anyway. Still if you come by can you spoil Ninja in secret to save Dad's taste buds just a little bit.