A dental lecturer was overheard having sex in his office by a colleague as she tried to comfort a student who was grieving over the death of a family member, a hearing has been told.
Dr Alec High is accused of repeatedly engaging in sexual activity in his office at the University of Leeds, despite being warned about his conduct.
A practice committee at the General Dental Council was told at least four colleagues overheard Dr High's sexual liaisons, often spotting a woman entering or leaving his office.
His alleged dalliances are said to have continued for more than two years, and even though a senior colleague told him his behaviour was not acceptable, he carried on, the committee heard.
Dr High even allegedly lied to a university investigation into his activities, trying to convince staff that he was working at a hospital at the time it was claimed he was having sex with a woman in his office at the school of dentistry.
But it was found his computer equipment was logged on and connected at the university's Worsley building, where his office was based, the committee heard.
Dr High was charged before the committee with repeatedly engaging in sexual activity between January 1 2013 and March 11 2015, and again between 2pm and 3pm on March 12 2015.
He is also accused of inappropriate and unprofessional behaviour, and of giving a false account of where he was on March 12 2015, which is said to have amounted to misleading and dishonest behaviour.