Different
"… What makes you say that?"
"Come now, Kitten. We all know about you and the Bats." Mentally, he pulled a face. "Surely you can see that there's something very… different… about him." And it was true: there was something very different about the Dark Knight. And it only became obvious when the reformed Riddler, of all people, had been the one to point it out.
Catwoman rolled her shoulders and he imagined her rolling her eyes. "Stop being paranoid, Rags."
He watched as she went off and frowned.
It appeared that Batman wasn't the only one who was different.