Shifting sands were useless when you wanted to land an army. You needed well-compacted beaches to take the weight of landing craft and equipment such as tracked vehicles as well as lorries and guns. War drove the development of geomorphology just as much as the high-tech sciences that we usually hear about. That was a surprise to me.”“Fascinating,” agreed Prudence. “How did they know whether a beach was suitable?”“You can get a good idea based on where the sediments are coming from. If you have cliffs, eroded and fallen rock gets graded by the waves, with grain size getting smaller as you move away from the cliff face. In the case of flatter land, without cliffs, the beach is primarily made up from river deposits, and the shorter and steeper a river flows, the larger the size of sand and gravel grains. The longest rivers deposit fine-grained silt and mud because of the longer time of transport down the length of the river. The lighter stuff flows more easily.”“It makes sense,” agreed. "A very big part, I'm sure," he winked."Okay," he clapped his hands. "It's time to get Maria sperminated and up the duff. Guys, we want this to be a wham bam thank you ma'am session. The idea is to pump the slut as full of sperm as quickly as we can. All the action will be in the missionary position in the hope that it will keep the slut's cunt as full of sperm as possible, thus increasing the chances of getting her pregnant. Number one, you can start fucking my wife."Number one was a strongly built man in his early forties, with a bit of salt and pepper in his hair but no pot belly. He rubbed his hands with glee. "I've been stroking for ages at the prospect of fucking you, Maria. Get ready cause here comes my load."He had already inserted his long hard cock into Maria's pussy as he spoke and was soon banging away at the whore. Maria's big tits bounced around her chest as he rammed his cock into her cunt, grunting with the exertion.Maria bit her lower lip as she felt his rod slamming.
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