With a spontaneous relationship, you keep each other active. And sure keeps things fresh. Exciting for sure.
Put them together and you have a relationship that is both full of love and full of excitement too. Keeps the relationship alive. You openly show affection towards each other no matter what anyone says and aren't afraid to express your feelings in a wild, over-the-top manner.
BOY: "I'm always so spontaneously romantic with my girlfriend, she loves the crazy things i do to show i care, and vice versa."