It appears to be a slang word which was coined somewhere along the line. I have not done any specific research on the origins of the word ‘supi’ a...d so this is mere conjecture; but I would guesstimate that it was coined in the 1900s & probably the latter part of that century rather than the earlier?Anyway, I was researching online for my PhD thesis proposal when my sweetheart said “You know the origin of the word ‘supi’ don’t you?”.”No” I replied, shaking my head and turning away from my laptop. . 'Sounds better then fun. You're going to let me take over again.' Lets not and say we did. I know my mind and even with part of it now dedicated to fucking Lin ever second of the day, I think I can moderate it well and good. 'You're a 29 year old Supernerd with the build of a NFL Linebacker, and up until today you'd never once acted on your desires.' And your point being? 'No. The point us; You Don't. I'm part of your mind. The part that you never learned to control. All you've done is lock. He pulled my balls up against the base of my cock and began to lick just underneath them. That first instance of oral massage to that area got me to leak more precum and this time he lifted it off my cock with his finger and place it directly on his tongue!Only after he repeated this a couple of times did he then stop, look into my eyes with a look I've never seen since then, and then take my entire length of cock into his mouth and down his throat!I never imagined that anyone would able to do. I can not describe in words the pleasure that Daniela made me feel, it was a pure excitement. She finished quickly and released a clear liquid for his cock (she took hormones), took it between her hands and began to pass over my hard cock, as if lubricating her. At that moment he started me to masturbate very hard, he squeezed my cock again and again, while we kissed. Close the shower. I made a mental effort not to finish, it was very difficult! But after a while, I did not resit and ejaculated.