A Weapon-making class in the future

You arrive exactly on-time in an open-air arena in the middle of a massive space colony situated in the middle of a star field, about three thousand years in the future. The humans from this time period are significantly more attractive than those from the present day, but even so, all of the beautiful female cadets are unable to take their eyes off your breathtaking looks, even among the presence of relatively attractive male cadets. Some of the more diligent students took out their electronic guide to scan you, informing them that their teacher for today was a Homo Sapiens and that they were a primitive species of human known for being generally weak compared to the humans of this era.

You begin the lesson by stating that this was your first-ever lesson with this class, then creating a solid metal slab the size of a garage door, but much thicker, seemingly out of thin air and instructed the class to fire their home-made weapons on it. The students whom had their electronic guide out used it to scan the block first before firing at it, but doing so only led to looks of confusion on their faces. As it turned out, the mysterious metal block easily withstood the onslaught of advanced weaponry that was unleashed upon it.

You looked at one of the digital notebooks that a student had out and noticed it had no information on the block you created, so you did a bit of hacking into the military academy's top-security network and added all of the essential information about the block into the school's database, informing them that the slab was nigh-indestructible. The entry also provided information on tiny molecular flaws one could use to make a weapon that would be able to damage it.

Some of the students looked daunted at the task ahead of them, but you assured them that they would be able to do it within the one-hour time limit if they tried as you proceeded to begin the timer.

One hour later, all of the students came back with new weapons they had just made. You then instructed them to fire their weapons at the slab one-by-one. The results were pretty effective, with every weapon being able to dent the slab's surface, ranging from particle beans to gatling guns to gravity grenades. However, none were able to do any meaningful damage to the slab.

After debriefing them on their task for the day, you unbuttoned your pants to reveal your weapon of choice for the task in hand, a mighty, massive, steel-hard cock supplied by a pair of balls so gigantic that they touched the cold metal surface of the firing range even when standing upright. After a couple of seconds, you fired off a cumshot without warning, effortlessly piercing through the nigh-indestructible slab with gallons of cum, causing the structure to collapse and making shrapnel fly everywhere.

The reactions were immediate. The dudes looked in disbelief as their finest high-tech weaponry was blown out of the water by the penis of a homo sapiens, one of the weakest forms of human to ever exist.

Meanwhile, the female students were masturbating wildly to your display of power, with one even being forward enough to perform an incredibly satisfying blowjob on your massive cock even while your initial cumshot was still ongoing, five minutes later. In this culture, women only lust for the most powerful human male they see, so a human of your power would have a harem of millions of extremely hot women in this world.

As much as you were enjoying the scene, you ended your cumshot prematurely (it would go on infinitely otherwise), re-made the slab and then you informed the class had to leave for your next lesson, but that you would come back yearly to see if they have made any progress on developing a weapon that could cause serious damage to the nigh-indestructible object.

However, as a time-traveller, you decided to keep tabs of their future progress immediately, as you visited every year to completely decimate the slab that the future human's weapons could only dent, even millions of years after your first visit, the yearly visit eventually evolving into a mating ritual where every woman on the colony got impregnated by your cock as the men watched on helplessly, as you were considered to be a god after out-living dozen of generations of the future humans.

For you however, it was a pretty lazy morning overall. You barely did anything, only using a tiny fraction of your potential to make those scenes happen. You decide that this afternoon, remind yourself of kind of scenes you can cause when you actually put in some effort...