An old lady kills her  90 years old husband  by throwing him outside their apartment window.

When she was asked by the judge to describe how she killed her husband, she said, that one afternoon  returning   home from shopping, she opened the door, and discovered her husband having sex with a young lady.
She grabbed him by the arms and pushed him outside the window in the void. 

 But why? asked the judge

She said, I thought ; if a man can have sex at ninety he could fly too.

 Ciro