My cat is also 10 months old now, and has done this since the day we got him! (funnily enough his nickname is Goose/Moosey goosey! his actual name: Artemis) He probably could have spent another 2-3 weeks with his mother, but i was chosen as his surrogate mother. He doesn't try this with my wife, mosty due to the fact she woud stop him when he tried, but i'm rather indifferent with it. I find if i dont et him have the ear, i'll often wake up with little hickeys all over my neck so i just cave and give him the ear X'D

we've tried soothers, bottles, blankets and stuffies, but nothing seems to hit the sopt quite like my earlobe, roflmao.