A scientific explanation of the effect lies in the manner in which the tongue is applied, vellicating the nerve-endings over the vaginal topology in a...specific sequence, that triggers a sudden secretion of the pleasure chemicals dopamine and norepinephrine in the brain of the subject. The speed and the order in which these pleasure neurochemicals are released, cause a positive feedback within the brain due to each of the chemicals inducing the release of the other. The resultant flooding of the. Most of the girls were wide eyed as Kate kept stroking my cock until there was a line of cum splatted on the locker room floor, once I finished Kate wiped the last drop from my cock with the tip of her finger and put it into her mouth. The girls retrieved their pant and ran out giggling, I put my pants back on and headed into the hall, Kate and Susan joined me shortly after and we walked home.The evening was quiet and uneventful at the Johnsons, Tommy and I headed to bed and put the light out.. "Oh great Kathy thought, biology and sex education... well that isn't like seeing your own mother half naked on an exam table.Dr. Martin nodded his head in approval. "Look Mrs. Ogden I'll keep the exam to a bare minimum and promise that I won't expose you any more than absolutely necessary and you can be the guide." He took her by her elbow led her and Chris through the door and down the hallway that led to the examination rooms. Dr. Martin opened the last door and let Chris and Kathy inside. I agreed and she said, she was smiling because she had observed me staring at her on the first day we met and also today. I didn’t know where to hide myself. I was so embarrassed.She sensed my discomfort and quickly said “it’s ok Raj, this is normal behavior for guys of your age”. When she sensed I was still uncomfortable she came and sat next to me, held my hand, lifted my chin so we could see each other face to face, she looked into my eyes lovingly and said “Don’t feel bad, come on give me a.