A US university president has said he is "disturbed" that a psychology professor allowed a demonstration of a motorised sex toy in a lecture hall.
Morton Schapiro of Northwestern University called the decision to allow a naked woman to demonstrate use of the device last month "poor judgement".
About 100 students observed the proceedings following a lecture session for a class on human sexuality.
Attendance was voluntary and students had been warned what to expect.
Controversial topics
On 21 February, psychology professor Michael Bailey held a lecture on sexual arousal, with a focus on certain aspects of female physiology, according to a statement he released on Wednesday.
http://www.bbc.co.uk/news/world-us-canada-12642898
Note: 3 March 2011 Last updated at 22:05 GMT