[ensonar]

I'm not sure if I'm answering your question correctly, and I'm certainly no authority. But I think in general when they say to rub it on the genital area, they mean just that. The genital area. In other words, the fact that there isn't a large surface area on the penis... and balls specifically, doesn't mean you can't just lightly brush the area surrounding it. I think directing the energy to that area is enough.

As in the third pass on the first tensegrity video "the ball of energy", I believe the energy is directed to the genitals, not an imaginary womb and ovaries on a man.

I've never heard of the "cramped issue" that you mention.