Dating lessons from my football-playing best friend? Sign me up!At the glittery break-up party she throws for herself, Rachel Dumont envisions lifting a glass to celebrate being free and single again. What she actually does: Drink too much champagne and blurt out to her best guy friend that she'd really like to get back on the horse. She doesn't expect Carter Hendrix's answer to be to volunteer himself.With his sinful brown eyes and too-good-to-be-true body, it'd be no hardship for Rachel to say yes, though she certainly doesn't want him to feel obligated to, um, service her just because her failed, loveless marriage was an s-e-x desert. But since the charming and confident pro football star owes five public dates to his dating app sponsor, Rachel and Carter make a deal to help each other out.Pretty soon, the public how-to-date lessons turn into, ahem, very private ones. And Rachel's a star student, graduating quickly from flirty banter and lingering looks to toe-curling, sheet-grabbin