Sagittarius (Nov. 22-Dec. 21) Spontaneous and fun, this fire sign is always up for an adventure. Having a relationship that keeps them on their toes is just what they're looking for since they're far from boring. The best way to entertain a Sag in a romantic way is to plan unconventional dates, dive deeper into the relationship every chance you get, and make them feel like they're the only person in the world. Image Source: Getty / PeopleImages