Starting with a constant mass of a gas, with a fixed volume, change the temperature, the pressure tracks according to specific parameters. That’s Boyle’s Law, Charles’ Law, and Gay-Lussac’s Law. Simple, really. You can complicate it hugely when you start dealing with a gas that changes states with temperature, like water for steam. Then you get into steam tables, where you start dealing with the Rankine cycle. When you flip that light switch on, the light comes on because of what we know about this stuff.”His mouth opened slightly. “And internal combustion engines?”I smiled. I’ve got ‘im. “Chemistry is still there in combustion byproducts produced by the interaction of hydrocarbons with ambient air. A given volume of air contains a known amount of oxygen and other gases. The oxygen, which we know, interacts with the hydrocarbons, which we know, producing heat as well as gases – carbon monoxide, carbon dioxide, oxidized nitrogen compounds...”“Okay, you got me...”“The idea,” I said. I squirmed around as he pulled me off, then he spread my ass cheeks and licked my ass as he wanked me, it felt awesome. I knew I couldn’t last too long and told him so, but he carried on regardless. As my climax beckoned I said “Please I’m coming” as his rhythm got faster his tongue ran over my piss slit, then I came.Loads and loads of fresh teenager spunk shot out of my cock and landed mostly in his mouth, my first ever blow job, he swallowed it all except for a dribble down his chin, the feeling as he sucked as I kept coming was immense. As I sat breathing heavy and gone limp he stood up and removed his trousers, his cock was a good 7” and I just stared at it.He parted my thighs and licked my ass, I knew what was coming but didn’t know how to prevent it, he nudged himself into my ass, and gently at first and then when he was all the way in he shagged me harder, the feeling at first was painful but then became enjoyable as he slammed into me. After only a few minutes he was moaning.
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