And then there is the universal role of adult. When you play that role, you take yourself and life very seriously. Spontaneity, lightheartedness, and joy are not part of that role Related Posts:Playful Full of fun lightheartedness and a sense of play.The ultimate lesson we all have to learn is…Lightheartedness Playful and carefree promoting joyfulness.Diverting Entertaining amusing. Inspires lightheartedness.