earlobe fetish
you have an earlobe fetish if you think some earlobes are the best part of someone and you can't resist biting them.
I saw him in the hallway and all I could do was bite his earlobe.
She came to my house and I bit her earlobe so hard it turned red.
He asked me to the movies. I said yes, but only if I could nibble his earlobes.