I recently got a job as a nurse at a clinic. It's my job to take precum samples from patients. Basically, what I do is lube up their cock, and stroke and tease it, so that it will drip precum into a cup. Today a patient came in for an STD test, and I lubed up his cock and stroked it off with my latex gloves. Every time he was about to cum, I slowed down to collect more of his drippings. Of course I did not finish him off, since it is just my job to get the precum. I collected quite a large sample from this patient.