Because some dreams represent the unfulfilled desires, they are shown like that. So one can smartly know the mental condition of anyone by analyzing his/her dream. Let's see another example.
One of my friends said that she had seen an strange dream at night. She was getting marriage with her classmate in her dream. She was afraid as marriage in dream generally represents decline in life span of the dreamer. But I was still calm and smiling. Because I had known the secret that she loved that lucky classmate.
Discovered by Parinav Jha via Don Prince