I use two different positons for collection of a semen sample in the exam.

THE TRADITIONAL POSITION:
In this positon I place the guy on his back on the exam table and, while manipulating the penile shaft with one hand and massaging his prostate with the other one, I collect the sample in a petri dish, as illustrated in the photo series below.

THE NON-TRADITIONAL POSITION:

The guy is placed on his hands and knees on the table.  I lubricated my gloved hand well, and cuff it around the penile shaft.  While he moves in and out of the gloved hand, with my finger I massage his prostate gland to give him added pleasure until the sample is submitted.

Both positons work well and bring that added eroticism guys want in their fantasy exams.
Traditional Position
Non Traditional Position
Option 1 - Semen Collection
On To Option 2