I knew there were stipulations about the sperm drive..especially about how much should be collected from each donor. This kid came up a bit short so I did what any good nurse would do and offered some of mine. I knew he'd appreciate the gesture. Without wasting any time, Zach got down on his knees and started servicing my shlong and every now and then he would look up at me with those appreciative eyes. Don't know if he was grateful for the gesture or cause he loved choking on my meat. It'd been a while since it was worshipped as good as he did it. I busted my load on my lower abs and he scooped it up with the specimen cup. As I lay on the exam table I couldn't help but wonder what other fun experiences await me at the clinic.