The psychological and physiological mechanism of love is so complex that at a certain period in his life a young man must concentrate all his energy on coming to grips with it, and in this way he misses the actual content of the love: the woman he loves. {In this he is much like a young violinist who cannot concentrate on the emotional content of a piece until the technique required to play it comes automatically.}
The complexity of love involves both psychological and physiological factors, which can be overwhelming for a young man. At a certain stage, he tends to focus all his energy on understanding these intricacies rather than experiencing the love itself, represented by the woman he cares for. This intense focus on the mechanics of love can lead to a disconnect from the actual emotional experience.
Kundera draws a parallel between a young man's struggle with love and a young violinist learning a piece of music. Just as the musician must first master the technical aspects before they can connect emotionally with the music, the young man often finds himself preoccupied with understanding love rather than fully experiencing the relationship. This highlights the tension between technique and emotional depth in both music and love.