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
(..) A professor, a geneticist, a lab technician... And a sandwich girl? - Do you really think he's after me? - Truth spell. Piper, we need milk. Kitchen. - She's carrying. - Carrying what? A baby, she's pregnant. No, no. She doesn't know yet. What do we do? Do we tell her? (..)1998 TvShow: Charmed Title: The Truth Is Out There... and It Hurts Season: 1 Episode 8