Originally posted by Ya Krunk'd Floo
Obviously, he is also a masochist as seen by his taunts to Batman in the finale to the chase scene ("Come on! Hit me!"😉, and his laughter as he plummets after Batman pushes him from the tower.
I thought those were related to him trying to corrupt Batman into breaking his rule about not killing anyone. He knew Batman wouldn't run him over, but he kept taunting him by taking a few shots at the bike, hoping he'd 'win' by getting hit. Same as when he fell, Batman pushed him so technically he would have killed him, therefore breaking his rule and again the Joker 'wins'.
To Joker, it's all about the bigger picture. Things like getting run over, getting beaten up in the prison cell etc arent about masochism, its more about knowing that every punch he receives is pushing his 'incorruptible' enemies closer and closer to becoming like him, and he's willing to ignore pain/make the ultimate sacrifice to do so.
But then again, maybe he is a masochist and scarred himself for the pleasure srug