This reminds me of a joke I heard years ago.
A man on his death bed is visited by his wife and 4 sons. The oldest 3 are huge, over 6'4", broad shoulders, athletic build, and the youngest is a scrawny kid with glasses, 5'7".
The man asks his kids to leave the room and he asks his wife "My love, I don't want to leave this world without knowing so I hope you can answer this question. I've always wondered. The youngest son, is he mine"?
His wife takes his hand, looks him in the eyes and says "Yes my love. With my hand on my heart, I can say he is your son"
The man breathes a sigh of relief and says "Thank You" before he passes away.
His wife looks up at the nurse and says "Thank God he didn't ask me about the other 3"