Everything from peace and quiet to hair-raising excitement is right there in one place. There's just one catch. We are not permitted to enter the restricted areas. Crossing the boundaries could jeopardize our well-being and would get us thrown out of the park. We can have endless fun and excitement only as long as we stay within the boundaries.
Romantic love is the same way.
God designed it in such a way that it leads a couple to commit themselves exclusively to each other. Within these biblical boundaries, romantic love has the freedom to grow and flourish in extraordinary ways. That's romantic love in a nutshell. It is exclusive because it is priceless. Because it is so valuable, couples need to guard and protect their relationships against anyone and anything that might threaten the exclusive nature of their commitment to each other.