I was so nervous as I walked into Dr. Wolf's exam room. It didn't help that he was more than a foot taller than me! He asked me to lie on the examination table in the corner of the room so that he could do some tests. I think he was checking for hernias because he started running his hands real slowly around my groin. I looked down and saw that he was rock hard! I could see the bulge in his tight suit pants. He smiled, almost wickedly. Some primal instinct made me reach out to touch it. I couldn't believe how big it was. Moments later, I was undoing his belt and pulling Dr. Wolf's giant tool out of his underwear. He asked if I'd ever had anyone inside me. I said no. He asked me if I wanted to try and I heard myself saying yes! I felt a rush of excitement and nerves as he lined it up against my hole. I lay back on the table, instinctively knowing that I needed to stay relaxed. Then he started pushing into me - slowly, inch-by-inch. Words really can't describe the sensation. It was almost overwhelmingly painful, and yet, at the same time, the most erotically sexual sensation I've ever known. He grabbed my feet with his hands, and started thrusting. It took my breath away. I kept thinking, "So this is how fucking feels." It felt like he was actively trying to bang the cum out of my balls! I couldn't control myself. It felt too good. Thick jets of creamy spunk flew out of the end of my shaft!