Three women were turned into flowers in a field, but one was allowed to return home each night. As dawn approached one day, she was forced to rejoin her companions and become a flower again. Before leaving, she told her husband, "If you come to the field this afternoon and pick me, I will be freed and can stay with you forever." He agreed.
The question is: How did her husband recognize her, since all the flowers looked exactly alike?
Answer: Because she spent the night at home and not in the field, no dew settled on her petals, unlike the others. This was how her husband identified her.