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.