Krachai dam does not increase the number of cells of the penis. Why should it? There is no need for it.
A bodybuilder who achieves a biceps like Arnold also doesn't increase the number of muscle cells. He only changes their condition.
The biceps, like any other muscle, and like the penis (which isn't a muscle but a sponge) are not of a fixed size, but consist of a genetically determined number of cells. Size depends on cell condition, not cell number.
And on the chemical environment.
You can increase the size of a biceps by injecting anabolic steroids. The muscle will grow, even with no strength training.