He was filled with 'the milk of human kindness'. [=he was filled with kindness; he was very kind]
They 'milked' [='exploited'] their advantage for all it was worth.
greedy landlords 'milking' their tenants of all their money
(..) I was years old when I was murdered And up next, we have Crystal in a little, bitty, skinny mini! This was before missing kids started appearing on milk cartons or were feature stories on the daily news. It was back when people believed things like that didn't happen. (..)2009 The Lovely Bones