GIRLS.. is it normal that you don't pay as much attention to your boyfriend talking as he does to you?

My girlfriend likes to tell me EVERYTHING but when it's my turn to talk she falls asleep or doesn't pay as much attention to me. She actually remembers a lot of what I say but she seems disinterested. Is that normal?
GIRLS.. is it normal that you don't pay as much attention to your boyfriend talking as he does to you?
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