Anyone who was a child in the late '40's will have had it drummed into them the milk was a Good Thing (free at school, off the ration) and as far as I'm concerned it still is, within limits. Nothing could beat slurping the cream off the top of the bottle, and still can't. Fortunately, at the moment I don't have a cat, which would obviously have first shout.
Free school milk nearly put me off milk for life. In summer it was stacked in the playground in the sun for a couple of hours before we got it, so it was always warm and slightly off. I now only drink skimmed when I have a choice - full cream just tastes greasy to me. However I still eat too much cheese and use plenty of whole milk & cream in cooking.
I went off milk somewhere between 14 and 18, I reckon. I used to drink loads of it before then. The thought of the cream off the top of the bottle makes me feel queasy these days. Oh, and please don't even mention the "straight from the cow" option - yuk!
We have a cat but he doesn't like milk, or cheese, strangely. First cat I've known not to like either or both. We had school milk in the 50s, in 1/3 pint bottles, and a choice of orange juice (which I preferred) and then Jersey milk was very creamy (it's not now due to over processing). I can remember the milkman delivering the milk in churns and filling up a jug my mother used to leave on the doorstep. I think they introduced bottles in about 1956. Then bottles were replaced by humbug shaped Tetra Paks in about 1967.
(Software) Cats shouldn't have milk too often but binge-licking every now and again won't do any harm. Cats are also useful for hoovering up bits of chicken off the floor.