Daughter (6) was sitting in the windowsill with the window open, watching me mow the lawn. She began to sneeze and sniffle, showing evidence of grass allergy (of which we were already aware).
Wife says, "Well, honey, if you are allergic to grass, you probably won't be able to mow the lawn when you get older and have a house of your own."
Daughter replies, "That's okay. I'll just buy a husband."