These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
There is also the episode where Batgirl, having been turned into a cat, finds herself on Catwoman's lap and enjoys being petted. Les Yay level briefly shoots through the roof when she regains her normal form.
In that same episode (Episode 2: Lap Bat), after you interact with the mouse, you'll hear this:
Batgirl: [thinking] She's never this nice to me. Most of the time - ooooh. Oooooooohh yeeeah, right behind the ear. Scratch behind the ear. Behind the ear, woman!
Harley even says, "you're goin' legit, huh?" when she asks why Ivy's holding flowers and she says, "Batgirl."
Fridge Logic: Mr. Freeze is a man. Ignoring the fact that it doesn't even fit his ice theme, why would he make a gun that only got rid of men?