Emma Kupferman has always been the person her friends come to with questions about sex. “I think it’s because nothing embarrasses me, people know nothing is off-limits. I believe people can do whatever they want with their bodies, as long as it doesn’t hurt anyone.” Now she’s using her unflappable nature and more than a decade of experience in clinical social work to tackle a new challenge: sex therapy. Emma is the newest employee at Freed Bodyworks, a holistic health center…