Veins are usually in the loose fatty tissue between muscle and skin.
Interesting enough, there is no fat there in our dicks, but a little bit of loose connective tissue (that is why the skin can move relative to the tunica.
The veins are neither attached to the tunica nor to the skin, so they just move along as the rest of our dicks moves (just like from flaccid to erect: they must be loose, tortuous, and elastic to take the size changes. Later ttt
Later - ttt