You are in my room, and I let you know all your tests came back clear - but we need to test your semen production. I unbutton my lab coat, revealing a slutty nurse dress underneath. I tell you I have loads of experience with this, and that stimulating your prostate is the best way to get a big sample. I start off stroking you, then rubbing your asshole, then putting one and two fingers inside. I make sure to tease you with my body and show off my perky tits. Then, we switch off, and you finger yourself for me while I get your big load of cum all over my hands. I take a little taste and tell you it's a great sample.