Hello moms! We're 5 months ? The baby often touches her ear with her h…

Hello moms! We're 5 months ? The baby often touches her ear with her hands, rubbing it. I'm worried, they say if a child has an earache they do this. Maybe she just learned a new body part and is studying it. The little one is capricious, she can throw a tantrum if something isn't done as she wants! Question: when did your children start studying their ears at what age?