Tell a joke. Brother and sister.

A brother went to the toilet and ended up in the ladies' room by mistake. When I went in, I found there was no urinal. It doesn't feel right Fortunately, there is no one in the toilet. He walked out casually. When I opened the door, I met a mm who came in. Face to face with him, blushed, lowered his head and turned to drill in the men's room. ...