Episode 55 of "Scrubs"
s03e09 My Dirty Secret

Elliot's feeling uncomfortable using clinical terms for her patient's private parts – a result of a repressed childhood and an accidental orgasm she inflicted on a patient during a pelvic exam - so Carla tries to teach her how to say "vagina" and "penis" without blushing. Meanwhile, Dr. Cox crashes at J.D. and Turk's after taking bad advice from J.D. Carla suggests no more sex until the wedding and Turk only comes to terms with it after learning the real meaning of romance from a patient with prostate cancer. Ultimately Carla backs down on her own idea when she has a stressful day at work finally letting people make fun of her.