Question: happiness is a warm gun meaning?
Answer: The magazine had adapted the headline from the title of the bestselling book by Peanuts cartoonist Charles M. Schulz, Happiness is a Warm Puppy. Some commentators suggested that the "warm gun" could refer to Lennon's sexual desire for Yoko Ono or, due to the drug connotations in the lyric "I need a fix", to a syringe.