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
(..) But, from a physical standpoint, she is doing remarkably well. Thank God. She's been taking your milk from the bottle all the time now, right? - Right. - Then I think we can permanently remove that feeding tube. (..)2005 TvShow: Six Feet Under Title: Everyone's Waiting Season: 5 Episode 12