The gynecological exam episode
I recall an episode where Rhoda went to see a gynecologist, maybe for her premarital exam, and as she was walking into the exam room someone made a joke about about it being cold in there.
I think the inference was that it would be uncomfortable for her to be nude in a flimsy gown and with her legs spread and feet in stirrups while some male doctor was examining her vagina.
Anyone else remember this?