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
(..) Where is the baby? There it is! Where is the baby? There it is! Stop it! You're scaring it! I bet he's hungry. How about some milk? I'd love some. Not you, the baby. I ain't exactly doing it right now, pal . You alone are the food jamming mouth, aren't you? Enough! Food! (..)2002 Ice Age