Doctor McBlow needs another sperm sample

"I'm happy to hear that Ordinary Seaman Ed but its my job to ensure you your health is protected, males are not just a necessary evil but vital to the continuation of our species, if the males onboard this ship were to become infected with a disease it would spread through the rest of the ships crews within days" Doctor McBlow.

Ed squirmed yet Doctor McBlow kept a grip of his cock as he considered all of the unprotected sex he'd been required to have by law since turning 18. "You mean... I could be infected..."

Doctor McBlow looked at him sternly, she took a breath to continue her lecture then burst out laughing "I'm sorry, I couldn't help myself. STDs have been mainly confined to history due to the limited number of men available, also, all the crew are regularly screened just in case."

Ed visibly relaxed at her words, the tension leaving him asking "then what kind of tests am I here for?"

"I need to assess your vitality further, you did impress during your evaluation but I'm afraid I need a further sperm sample from you, there wasn't enough left after I and my fellow Officers sampled you" the doctor confessed.

"I see, of course sir." Ed acknowledged before reaching down to stimulate himself to give her a sample.

"No, no, its better I do that for you" Doctor McBlow reassured him as she knelt before him and swallowed his driend cum covered cock in her hungry mouth. Ed gripped the bed as she sucked him off him long deep swallows that nearly took in his balls. She stopped after a few minutes and stepped away, Ed watched her carefully wondering whether he was required to fuck her now.

Doctor McBlow rinsed her mouth at a nearby sink and smiled at him, "now that your cock is clean of those other bitches I want you to cum in my mouth. Do you think you can do that for me. I need your cum in my mouth, I need to taste it."