As I’ve understood it from mbuc’s qoute of the Wikipedia (please enlighten me if I’ve misunderstood this) the CCs are surrounded by two layers of tunica, the outer being more taut (strong) in the lengthwise direction and the inner layer more taut in the girthwise direction. The difference was about 50% (or was it 100%?), the strong direction was 50% stronger than the weak direction for each layer. This is pretty much like a two-layer plywood.
Imagine a sponge (or elastic dishcloth, the yellow kind your wife has to dry the sink) - stretch it in one direction with force X and it will give distance Y. Now apply a crossdirectional tension before you stretch it in the same direction again (get your wife to hold the dishcloth and stretch it sideways while you stretch it up-down again) and you’ll probably find that the distance Y is a little bit shorter.
The way I think of this is that when we stretch lengthwise (hang, stretch) we primarily put the outer tunica to use, and it is stretched without restraints to its max. When you have an erection you are tossing the inner tunica into use and thus limiting the ability of the outer tunica to stretch lengthwise. By the same reasoning, the inner tunica will be prestressed and difficult to budge if you are erect, and that would explain why jelqs (semi-erect) and Orange bends work.
This idea I have does not conflict with the sinusoid theory, it might be a little of both. Comments?
I know this is a few years old, so semi-erect jelks just help EL?