15 month old biting!

Alicia • Mom 👧🏽🧒🏽👼🏽 #AngelMom

My twins are 15 going on 16 months. My son is biting and IDK what to do. I tell him no every time but he is not biting his sister. He will just climb on her and bite. I have heard bite him back but idk how I feel about that. Anyone gone through this have any advice? Is biting him a back effective?!