In Lars von Trier's controversial "Nymphomaniac Volume I," Stacy Martin delivers a tour de force as the younger Joe, a woman recounting her erotic awakening. The French actress, then just 23, bares all in explicit scenes that catapulted her to infamy. Martin's innocent yet hungry portrayal of Joe's first sexual encounters, from a steamy handjob to a sultry topless dance, is a captivating blend of raw passion and vulnerability.