In this case it's corporate being especially protective of Batman, and terrified of anything that might affect toy sales (among other things). IIRC Justice League unlimited had quite a few episodes shot down or rewritten because of various Batman related edicts from on high. And parental backlash after Batman Returns is part of why we got Joel Schumacher. Hell, it's how we got Robin and the no killing rule, because they wanted to make the comics more marketable to kids.
Shit on the other side of the 4th wall is often the biggest problem superheroes face, and not just through censorship. It's why Spider-Man made a deal with the devil. And it's why Arkham has a revolving door, since popular and marketable villains need to keep coming back (which is why the "Batman should kill people" argument is idiotic, as any villain that won't stay in jail will also refuse to stay dead).
These are corporate owned characters. The company in charge is going to care far more about making money and protecting their brand than they will about art, consistency, or even whether their policies are rational. Hell, they canceled a Green Lantern show that was popular and successful because they weren't happy with the fucking toy sales.
And presumably they've been fighting crime all night in those suits so they're likely quite sweaty and dirty. And it's Gotham dirt. Catwoman's going to wake up with a UTI.
Batman has a utility belt. Do you think he doesn't have something to freshen up his breath or wipe down his face after getting sprayed with all sorts of shit.
Everyone always brings up stuff like that but in the moment no one would care. Endorphins are pumping emotions are on fire and they already wanna fuck each other.
“As sure as I am that he fucks bats, I know he doesn’t go down on women” - DC, probably
Seriously, I know the creators had to fight for the commissioner Gordon storyline, but how did they not allow this given all the other stuff in that show?? Show runners were spot on with the selfish lover comment.