The subject had been primarily descriptive up to the 1930s, but the advent of war resulted in a demand for information about processes affecting beach...s in particular, so that judgements could be made about where to make amphibious landings of invasion forces. Aerial photography also demanded information to assist in interpreting what was observed in the images. So the scientists had to get their skates on and come up with answers.They studied beaches in the UK, to get benchmark data, and work. .?" mom was shocked to see his monster. "Vinod... that's too big... " . Uncle asked her to shut up. I could see fear in her eyes now."Get him ready, Shilpa.... for your pussy.... she is crying..." uncle said naughtily, pulling mom's face close to it."What are you doing, Vinod? I have never done this..... I won't take it in my mouth..." mom pushed him away."Come on shilpa.... there is always a first time.... " uncle tried to convince her."No Vinod... I'm sorry... I can't do that..." mom. She drew it down and then up his spine. She spun it over each shoulder and down his side in turn. Mark continued to moan. During all this Serena was unable to avoid noticing the muscles and the smooth skin of his back. She substituted her hand for her hair, stroking him with featherlike touches. Mark never moved but continued to moan. Finally she could bear it no longer and kissed him softly between the shoulder blades then moved up onto his shoulders as her breasts pressed gently against his. I slid in between them and kissed and licked and sucked her inner thighs. This made her crazy. She was writhing around on the bed with my every touch. I squeezed her boobs with one hand while with my other I explored her more and more.Then I turned her over to turn my attention to her ass. Perfectly round and firm as I mentioned before and tender skin. I kissed her over her underwear and then slid the side of it so as to expose one of the ass cheeks. I couldn’t help myself and I smacked her ass.