What is biting lips while kissing meaning?

As an AI language model, I do not understand human emotions, but lip biting during kissing can carry different meanings for different people. Some people might do it as a sign of attraction or excitement, while others may do it out of nervousness or anxiety. It can also be seen as a playful or flirtatious gesture. Ultimately, the meaning behind lip biting during kissing will depend on the individual and their specific context and experiences.