A two-headed snake
Two-headed snakes are rare, but they do exist.
Are two heads better than one? This snake with two heads (or it is two snakes with one body?) might have an opinion.
Two-headed snakes are rare, but they do exist. Like conjoined twins, the two heads are independent in some ways but tied together in others.
As this video shows, each head has a mind of its own and decision-making is not always easy.