He couldn't stop staring at my lips when we were talking?

I was talking to a guy friend and putting on lip balm at the same time, and he couldn't stop staring at my lips and was talking TO my lips. His eyes were glued for a good 5-7 seconds (which is really long). Is putting on lip balm that fascinating? Is he thinking of something else? Am I reading too much into this?
He couldn't stop staring at my lips when we were talking?
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