My friends Deena and Lindsey had just left for a walk to the snack bar, which was all the way at the other end of the beach. Needing a rest, I stretch...d out face down, feet toward the sea, adjusting the top towel to cover from my shoulders over my back to just above the backs of my knees. My only pillow was my forearm, so I cradled my head as comfortably as I could, closed my eyes, and listened to the roar of distant waves and the mewling of gulls.The packed sand beneath the beach towel. ..." "Katie's toothy smile beamed at Mark as she said, "OK, see you then, in a few minutes....," uncrossing her legs and letting them part momentarily, but enough to give Mark a quick flash of her smooth, white thighs. Mark felt his cock stir in his pants. Katie stood, turned her back to Mark to let Melissa unhook her mike. Mark could see the fullness of Katie's hips and rounded buttocks close enough to touch. He wanted to reach out and run a hand up under her dress and feel her. I think he liked that because he didn’t pull out again, but just kept pummeling away. I knew that I’d probably not survive if this monster got me knotted, so I put my head down on the ground and reached back and covered my vaginal opening with my hand and fingers as best as I could while he moved in and out, trying to make sure that when he did climax, I kept his knot out of me. Finally I felt him start to shiver and shake and I felt his bulge smack into my fingers over and over. I stayed stock. I wasn’t even going to try to match them. Then came the fast runners. I started running at the pace I had ran the previous Monday when I was also working off my frustrations. I reached the other side of the school field at the tail end of the fast runners and ahead of the pack.The first side of the squarish course contained a gentle decline. The going was easy and I continued comfortably despite running at what for me was a faster than usual pace. One or two runners overtook me but I slowly.