“There you are, ready for me to check if our experiments have improved your sperm yield. You can even watch what I'm doing on the mirrored ceiling. I will use my latex gloved hand to edge your hard cock, rubbing those full balls and making lots of precum flow out to lube the head and shaft. You will get so close to orgasm, then I will slow down, it is the best way to conclude with a massive cumshot and load of cum, for me to collect for a sample.” Suggested Watching Position: Lying On Your Back With Head Support