This is intended to be the first image in a series... but I haven't even sketched the next images yet, so don't get too excited just yet. :)
A super soldier of exquisite male beauty and gargantuan muscular size has been captured and subjected to endless cruel experiments and tortures, and the evil scientists haven't been able to break him. So they decide to use his own staggeringly powerful virility against him. They are inserting a knobbed sound all the way down his colossal cock, blocking the escape of his cum, and then are injecting his goliath, watermelon-sized testicles with a virility accelerant.
On a normal male, Testicle Blaster 3000 will make his nuts manufacture spunk at ten times their normal rate, eventually burning his testicles out as they overheat and try to keep up with the fantastic rate of sperm production. But on a male of such prodigious size and insanely high virility, the effects will likely be devastating.
The scientists are hoping to see just how big and swollen the handsome muscle stud's mighty man nuts can grow... before they simply explode under the strain.