Hearing her words, and her voice, makes the resonance that much deeper and the storytelling that much richer — Cotton Candy on a Rainy Day is my favorite collection of poetry by Nikki Giovanni. It’s been about 13 years since I was first introduced to it, falling deeply in love with the titular poem. I still cling to “Habits,” “Woman,” “Introspection,” and “Crutches,” which deftly declares: emotional falls always…