This is purely half remembering something I heard a while ago, so it could be completely bullshit, but I believe it has something to do with things that are likely to spoil tend to be things that bind to the curds, and as such are (mostly) removed from the drink.
This is purely half remembering something I heard a while ago, so it could be completely bullshit, but I believe it has something to do with things that are likely to spoil tend to be things that bind to the curds, and as such are (mostly) removed from the drink.