It's quite satisfying

Here's a (NSFW) anime-type image of her...

What DemBears said, plus she's REALLY in love with the Joker, too. In the comics, he doesn't care about anyone. Many of the fans wish there was a mutual love thing going on, and the cartoon sort of touched on that. The trailer that I saw for Suicide Squad seems to show a romantic interest blossoming, also...

Oops... forgot the link...

imgflip.com/i/14hpqf

She was jokers (from batman)psychiatrist until she went insane and joined him in a life of crime. Do you seriously not know this?