Complete the expression: "In for a penny, in for a ___".

In 1952, the comic strip possum whose campaign slogan was "I Go ___" was named what? Complete the title of the 2000 Jude Law film "Love, Honour and ___". Complete the four-word 1960s hippie motto: "Make love, ___". Complete the title of Elton John's 1973 album "Don't Shoot Me I'm Only the ___". Complete the title of John le Carré's novel "Tinker, Tailor, ___". Complete the line from a parable in Matthew: "Many are called..." Complete the line from Luke 11:23: "He that is not with me is..." Complete the opening line of "Twelfth Night": "If music be the food of love,..."