Allowing my hand to be moved until it finally found its way into his lap. He squeezed my hand around his cock, and I could feel the enormous girth and...length. I couldn't pull away…even when he let go of my hand and let out a sigh. I just sat there, still looking ahead, with my hand wrapped tight around that bulge and frozen. “Play with it.” Was all he said, and I finally slowly glanced down at his lap, and began squeezing it and rubbing back and forth. I could feel it throbbing and jumping in. I kept on rubbing my fingers on her bare butt skin. I was also moving my fingers in her butt crack. I wanted to do much more than this but my friends were about to come. So i limited myself to this only. Now i moved her panty into her capri and made her butt exposed more and more. Now here ass crack was clearly visible.I took my camera in one hand and clicked a few pics of that hot butt. I bent forward and kissed her ass. I saw her face expression, it was amazing. She was enjoying it but could. When the last of his guests had gone to bed, he returned to the laboratory. Doug's observation kept echoing through his mind. His brain was changing. Why hadn't he thought of that before? Why was it so disturbing? Gads he had been so blind to the concept before Doug's observation. Hell after all the histologies he'd performed on his rats it hadn't occurred to him to assess their neurological makeup. Hum. One doesn't think of a brain as being particularly dimorphic but he was sure there. I pulled over to his side of the road, rolled my window down and said, “Hello.” He responded with the usual, “What’s up”? I said I was trying to find this street but that I had come in from the back side and not by my usual route so I was going to drive out of the area and re-enter following the route I normally drove. Hell, I didn’t even had a street name or address. I think he must have thought my story was kind of b.s. because he just smiled a bright smile and said, “Whatever.” I laughed.