A former Stoke Mandeville Hospital nurse has admitted making an aggressive sexually explicit threat towards a student.
At a Nursing and Midwifery Council (NMC) hearing, Perry Boss admitted making the comments towards a student at the hospital.
Mr Boss also admitted saying to the student, in reference to her practice: “Anyone can stick on a pair of marigolds.”
Both offences took place in June 2010.
However Mr Boss was cleared of four other charges.
These included claims Mr Boss had told the student he had seen her in a pornographic film.
Mr Boss was sacked by Bucks Healthcare NHS Trust in 2012.
A trust spokeswoman said: “The trust takes all allegations of this nature extremely seriously.
“The trust refers concerns to the NMC where appropriate and assists in any subsequent NMC processes.”
The NMC brought the misconduct charges against Mr Boss, believing his fitness to practice was impaired as a result.
The hearing, which was held in London from January 8 to 10, has been adjourned until February 21, when a sanction decision will be made.