Most of the students had already seen it, and nodded their understanding. The others marvelled. He resumed his talk.“That tells you that each note has a vibration level, and as the wave involved decreases in wavelength, the peaks of each wave become taller, so the pitch of the note alters, becoming higher. So sound waves in music are a reflection of the acoustic wave forms being generated.Now, the generation of sounds can be performed vocally through the larynx in your throat, or by a physical action such as banging a stick on another stick. When it comes to the history of music, we have to admit we have no idea where the first music came from. Did an early human hum to a rhythm, or bang a hollow log in a pattern; or merely clap his or her hands rhythmically? Another possibility is in noticing the echoes in a deep cave. If you call out a sound – a musical note – certain places with a cave can enhance the note, providing additional echoes to make the sound more interesting, as was. “Come on, son,” he said, “bring her home, give it to her. She’s not screaming yet.” Sam gripped Andrea’s hips and increased speed, achieving an impressive rhythm. Being spit-roasted, Andrea gasped for breath while groaning and moaning in pleasure as Rachel told her, “Just think, this is going to be the last cock you have as a single lady.”Sam didn’t last long before emptying his load but it was enough to make Andrea cum with him. Richard was still hard and he told Sam to move over, climbing aboard behind Andrea and ripping off her knickers. “We don’t need them in the way,” he said and easily slipped into her dripping pussy.As Andrea screamed to a second climax, grandma Rachel cleaned Sam’s cock, and they both watched Richard pounding away, listening to flesh slapping against flesh. Eventually, Richard tensed, grunted and gasped, and spurted into Andrea’s depths, sparking her third orgasm. Sam and Andrea cuddled up in one bed and Richard and Rachel in the other until the young man.
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