My girlfriend became aroused when her male physician tried to pull out her inverted nipple during an examination. It didn't hurt but turned her on to the point where the paper on the exam table became wet with her arousal fluids. She was embarrassed by the wetness but also by the odor that her arousal brought on. Not to mention her hard nipple, hard clit, and flushed face. The doctor was very professional, she said, and wiped her moist crotch when examining her without further comment.
She told me all this just after the exam while I undressed her and listened to her story. While casually, and gently, playing with her nipples, she suddently began to masturbate herself, something she had never done in front of me, and experienced a loud and very strong orgasm. I credit her memory of the exam more than my light petting with bringing on the climax. She apologized but I told her no apology necessary and went on to give her another, more gentle, orgasm.