Depends on the Catholic -- ask a Catholic confirmed pre-Vatican II and they will tell you there is only one pope Benedict -- who holds the position until the day God calls him home.

Ask a post-Vatican II Catholic and they will tell you there are two and one is retired. But they don't understand anything about the religion anyway so there could be a dozen popes and they would accept it because they wouldn't know the difference.

In short -- the former were required to memorize catechism and worship God. The latter sang guitar masses and thinks their religion is about social justice instead of about God.