Adding a pet to a relationship comes with a lot of new responsibilities and makes the relationship more serious now that you both have to take care of a raise an animal together.
Whether your relationship is brand new, or you've been dating for a while, there is some give-and-take that all relationships should have, and it is healthy when both partners take their turns.
Whether you're in the beginning stages of a relationship, or you're two years in and thinking about marriage, there are some things that you and your partner should enjoy doing together as a good marker to see if they are "the One".