Kitty by Cat Stevens explores the whimsical yet reflective feelings of a young man as he observes and admires a carefree and elusive girl named Kitty. It's a song about infatuation and the playful chase for affection. The key themes include youth, longing, innocence, and the joy of simple moments. Poignant moments in the song are when the singer describes his observations of Kitty, highlighting the vivid imagery and tender emotions associated with young love.