The lyrics use chocolate as a metaphor for a sweet, irresistible romantic attraction.
If you are looking for a humorous romance book series, you are likely thinking of Tara Sivec's Chocolate Lovers series . Like Chocolate - Tara Boy
If your interest is in a literary classic, this 1989 novel is the most famous "chocolate-themed" book. The lyrics use chocolate as a metaphor for
Seduction and Snacks , Futures and Frosting , and Troubles and Treats . Futures and Frosting