OMG! That is the one thing I don't understand.

Roxie loves the water hose, attacks the sprinkler system, and dances in the rain. But let the grass be wet

and she will gets this look of disgust on her face and will look for anywhere else to go but there. If she is really desperate, she will tip toe thru the grass while looking for the perfect spot but boy if looks could kill, I wouldn't be here!