A man hung himself...

...and a note was found in his pocket.

"Due to my the circumstances surrounding my family I've decided to end my life. I'm married to a widow who's got a daughter of legal age. My father, who visited us often, fell in love with this daughter and married her. My father became my daughters husband and my daughter became my mom, because she was married to my father. Then my wife gave birth to a son. That son was my fathers brother-in-law and my uncle, because he was my mothers brother. My mother (or daughter) also gave birth to a son, who naturally became my brother at the same time as he was my grandchild and my wife became my grandmother, because she was my mothers mother. I was my wife's husband and her grandchild. And because my grandmother's husband has to be my grandfather, I am now my own grandfather. After thinking a while about this I decided that there's no other thing to do than to hang myself."

Old Finnish joke...