Yes exactly: drinking milk with salty meals is a taboo in Italy. I've always being shocked by the fact that UK/US citizens drink mainly milk instead of drinking water. Moreover, I visited US a couple of years ago, and it was shockingly hard to find normal pure water, since people there use to drink almost only water variants or other beverages. In Italy the only beverages you usually find on the table during lunch/dinner are water and wine.

When I was child then I liked milk with everything.

Is it possible it was skimmed milk? I can't imagine having whole milk with, say, pizza. Too thick, hides all other flavours.

Same. Breakfast, lunch, and dinner I drank milk.

Milk isn't sweet, though?

I'm curious, are you from a country where milk is conventionally UHT treated? UHT milk has a sweet (and plasticky) taste to me.

It is sweet if your diet is not sugar heavy. Hi America.

AFAIK most Italian milk is UHT treated, yes.