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 don't really want her to see Why, why not? Because there are so many terrible sights in this world Like war or that that thing in Joey's refrigerator. Remember? It was in a milk carton but it, it looked like meat. Come here, come here. HA! There she is. Hi What? Nothing Hi (..)2003 TvShow: Friends Title: The One Where Rachel's Sister Babysits Season: 10 Episode 5