Prostate...massage?

Depending upon your point of view, either the best or worst study ever:

The visits will be scheduled in the morning and will need
an overnight fast. Each visit will last for 1 hour  1.5 hours.
At each visit we will ask you for a 24-hour urine collection,
blood and semen. At the second visit prostatic secretion will
be obtained from you via a prostate massage. You will be
asked to collect urine after the prostate massage.
Trained personnel will perform all these procedures.
Participants will be paid up to $100 for the proper completion
of the study. You will also be asked to keep a record of
your diet for 3 days before each study visit.
Detailed information will be provided at the orientation.