Romance is more than fun, but fun is part of romance.
Abimelech knows that Rebekah is Isaac’s wife when he sees them laughing together (Genesis 26:8). They let the cat out of the bag by having more fun than siblings should have together. A husband and wife can laugh, play, and enjoy each other with an incomparable intimacy.
The lovers in the Song of Songs run together (Song of Solomon 1:4), not because of danger or urgent need, but from joy and excitement. Solomon leaps around like a gazelle, peeking through windows and lattices at the most beautiful woman, and invites her to join in his frollicking (Song of Solomon 2:8–10). Later, the play becomes more intimate:
Your stature is like a palm tree, and your breasts are like its clusters. I say I will climb the palm tree and lay hold of its fruit.Song of Songs 7:8-9, ESV
The final verse of Song of Songs ends just as playfully:
Make haste, my beloved, and be like a gazelle or a young stag on the mountains of spices.Song of Songs 8:14
Among the many joys of romance and marriage is a unique, playful intimacy. Lovers are swept by powerful emotions to laugh, run, and play together. Safety, joy, and desire overflow into active enjoyment. Romantic fun is a gift from God, and should be enjoyed for His glory.