"I was in the right position so with those words I jammed my shaft in all the way in one stroke. She was already aroused so she was very wet. I took h...r by surprise because she let out an uff type of sound, but a second later she was groaning in pleasure so I knew it hadn't been too hard. She was so wet that I thought either part of her preparations had been masturbating or she liked playing rough.I kept up that pace for a long time. Just jamming it in as hard as I could before quickly pulling. Makes for a very wanting bitch for a k9 stud.A doctor on BF explained to me what is happening inside a girls body when a dog is fucking her..."I'll run through what is happening during the sex activity with a large breed male dog from the beginning to finish. He slides it into you and you feel a large spike of pleasure and stretching. This spike in pleasure which remains the constant level of pleasure while he is in the thrusting/fucking you stage of a sexual encounter with a human girl, is. " Annie said as she wrapped her arms around me. "I think I am going to cum." I whispered. "Well when you are ready, just bury that cock of yours as deep inside me as you can and let loose and that cum will flow into me along with all that stress of yours." Annie said. I made about three more thrust and then pushed deep inside her and my cock exploded with the biggest load of sticky hot cum either of us had ever seen. "My goodness hon, that was a huge load and your cock is still hard. That load. Kary, Ginger and Jennygrinned at him eyes shining, white toothed smiles glowing. "We know your secret." "Yeah....sure...ah...what secret's that?" Scott replied feeling the firsttwinges of panic in his stomach, his heart beginning to pound. "Oh.....don't even bother to deny it.....we read all your B&D fantasies.....and down loaded them onto disk.....everyone of them," Kary replied. "Yeah.......," Ginger recited from memory...... "He walked into the chamber.... naked, chains tinkling, before.