It's in the Joker's monologue in The Killing Joke, The comic that explains his origin. I highly recommend it. Guaranteed to send a shiver down your spine.
Never been a comic book lover, but I've always been interested in the Joker's character. I love psychotic personas. Heath Ledger was beyond amazing in The Dark Knight, and I'm hoping Jared Leto can pull it off in Suicide Squad.
Only reason I'd like to see Suicide Squad is because Jared Leto is great in 30 seconds to mars (his band) and I'm just interested in him as an actor.
Never seen the other batman movies and things, should I watch the Dark Knight?
YEAH WELL ONE DAY IS GONNA COME REAL SOON CUZ THESE MOTHERFUCKERS READ MY GODDAMN MIND AND THEY'RE MAKING A MOVIE OUT OF IT CZECH IT MOTHAFUCKAS