The Batman says no, but the Harley says yes...

"Harley, no matter how attractive you are, I am not going to have meaningless rebound sex with a complete stranger." Answered Batman as he was honest in his reply, figuring it was best to be honest and clear with the mad woman. He then continued, "If you have nothing to do with the Joker's robbery, you can go. Otherwise, I want you to turn yourself in since it would be best for you. Understand, Harley?"

"Yeah, I understand." said Harley, as she seemed to be taking things seriously in the moment. Which was enough to lower Batman's guard for a nanosecond for Harley to move her arm and hand towards Batman. As well as the pollen shooter she had been given by Red to fire the dust which the biochemist had created into the face of the Bat.

Batman coughed and tried to catch his breath, as the dust not only flew up his nose and mouth but also soaked into his skin, sparkling while looking like pink glitter. As it absorbed by Batman's body, his eyes became glazed over. Harley continued, "I understand B-Man. You're good-goody nature is making you say no to your little crush on lil' ol' me. Thanks to mama's little helper, you can admit the truth. You're head over heels in love with the bad girls, especially me and whoever I tell you. You would do, say, feel or believe anything I wanted you too if it would make me happy. You've wanted to jump and ride this Harley the moment you saw me, but your need to be a good boy kept you from saying yes.

Well, let me tell you something, B-Man. It's okay for even the most goody-goody hero to be bad every once and a while. It's okay for you to have sex with the woman you're crazy for. The woman you trust with all of your secrets. Your hot ride, Harley Quinn."

Harley knew this was an experimental new sex pollen Red had created, totally untested. To increase it's power, Ivy had decided to use some exotic ingredients. Something about alien or magical plants... maybe both. The result was an increase of sexual desires, suggestibility which potentially could create permanent changes, and other effects in the person it was used on. It looked like it was working as it should... but Harley wanted to see what was going to happen, as she asked, "What do you say this time? You and me, right now?"