A university psychology professor is facing investigation over a live demonstration of a motorised sex toy, made from a power saw and dildo, after one of his classes.

Professor John Michael Bailey teaches the popular human sexuality class at North Western University in America. This semester 622 students have signed up for his class, and sometimes additional after class activities are offered as optional extras. The 21st of February was particularly special.

The students were told at the end of the usual class that they could stay for an additional optional class, and around 100 stayed.

The class that day featured a guest lecturer Ken Melvoin-Berg, who is the co-owner of Weird Chicago tours. Mr Melvoin-Berg discussed various alternative sexual practices, such as bondage and fetishes. The class also watched a video of the female orgasm. This video was criticised as being unrealistic, and it was due to this that a couple decided to perform a display for the students.

Mr Bailey maintains that all of the students were repeatedly warned that the display would be graphic and a few students left the room. Most however, stayed to watch, and were rewarded with a live demonstration of a couple using the sex toy. It was Faith Kroll and her fiancé Jim Marcus, who stripped off to put on the performance, and Faiths’ subsequent orgasm was watched by everyone in the room. Faith Kroll later told the ‘Chicago Tribune’ newspaper that she had enjoyed the attention as she is an exhibitionist.

The president of North Western University, Morton Schapiro, takes a dim view of these events and issued a statement saying “I simply do not believe this was appropriate, necessary or in keeping with Northwestern University’s academic mission,”.

It is unclear how many official complaints have been received by the university, but Mr Schapiro is likely to ask many questions about the nature of Professor Baileys funding from the university’s College of Arts and Sciences department, as well as his payment to Ken Melvoin-Berg of $400 for his appearance as guest lecturer. Neither Jim Marcus nor Faith Kroll were paid for their part in the lecture.

The Northwestern University charges students more than $40,000 per year, and draws its students from a wealthy area. Students are said to be split in opinion of February’s events.