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 can remember the feeling of your hand on my forehead when I ran a fever. I remember stroking the cat, it was so soft. Siamese with blue eye and a broken tail. I remember the days of your milk in my mouth, the room, the liquid... I just wanna tell you that I love you, mom and dad... (..)2014 Lucy