It doesn't really matter, I'm just explaining why the whole Bruce x Barbara thing is a worry for some people. If it can happen in something as fairly lowkey as an animated movie, done by a guy who literally did Batman the Animated Series, it can also fairly easily be done by a guy doing something bigger like a live action movie. While true, there's always someone who's gonna ship weird stuff, especially like the stuff you just mentioned, they're not exactly the majority of fans. They're just a very weird minority who are twisting characters to fit their agenda and that's what matters most. Ships that most people actually support tend to be in line with both characters. Bruce and Selina is a good example. Bruce would never shag the Joker. It's just too out of character for too many different reasons. Selina on the other hand? Not so much. However, if you put something like Batman shagging the Joker in official canon, that creates a whole other slew of issues that could probably fill Pandora's Box.