he needed a sperm sample and handed me a cup...

Once I turned 18 my father decided it was time to take me to his doctor. The nurse told me to strip down to my briefs then wait for the doctor. He was probably in his mid 40’s, tall, very muscled, with brown hair, blue eyes, and a little bit of chest hair sticking out of the top of his shirt. After about a half hour he moved down to my briefs. His face was so close to my cock I could feel his breath. He examined it and I quickly became erect. I was embarrassed but he noticed and told me it was normal and that he thought I had a nice, big dick. Then he examined my balls and then my anus. His fingers in my tight butt hole felt so good I gave a little moan. He then said he needed a sperm sample and handed me a cup. Before I could begin he grabbed my penis and gave it a few pumps. Then he said he’d let me do the rest. He watched me jerk off the entire time. While leaving I noticed him adjusting a bulge in his pants.  Anon