The song "Pass auf dich auf" by Florian Künstler talks about the worries and anxieties that come with being in a relationship and caring deeply for someone. The lyrics express the fear of losing the person you love and the desire for them to always take care of themselves. The singer is constantly thinking about their partner when they are not around, worrying about their safety and well-being. The song conveys a sense of vulnerability and dependence on the other person, as well as the need for reassurance and communication in the relationship. It also touches on the idea of facing difficult times together and the importance of looking out for each other. Overall, the song captures the universal experience of caring for someone deeply and wanting them to prioritize their own safety and well-being.