Really? Again?

So, Protector runs up to Me and Captain outside and yells, "Muscles dumped pee on me!" At this point, I'm quite confused. Why does Muscles have pee in something that would allow him to "dump it on me"? Why in the world did this happen? How did this happen outside where, just to relieve any confusion, we do NOT have a toilet?

Come to find out, Princess, yeah, it was her this time decided that if the boys can pee outside, she can too... so she did... in a cup... and Ty "thought it was water" so he threw it on Protector. Aren't brothers (and sisters) great?