It okay to show a pony taking a bath.

…looks more like a cross between a bath and a shower.
 
…a shower that’s more like a fountain.
 
Her royal bath must use more water than the average pony uses in a day…

Oh how I’d like to give her a bath…

@Psychopomf  
Yeah, we actually saw that from Main #4, the image of her and Spike poking their head out of the pool, her mane was floating (not magically) on the water.

@Fenrixer  
Seriously??
 
I’d love to have a bath like that!

…That has to simply be the most elegant bath I’ve ever seen.
 
And huh. Her ethereal mane CAN get wet. Or maybe she just turns off the incorporeal aurora before bathing.

BECAUSE THEY DON’T LIKE YOOOOOOOOOOOOU
 
I’m just kidding princess. I think.

‘Dat bath. No matter how long it takes, I’m getting a bath like that one day.

That’s one wierd design for a bathtub.