Summertime saga Anon has a good time with his girlfriend's

"Hey, what are you doing in here?"

"Hmm, I'm just trying to take a shower."

He is telling that he came here so that he can take a shower and he could be fresh enough.

And, "Listen, this is for us, so go take it somewhere else."

She is telling this is only our place to take a shower and you go take it somewhere else.