Girth exercises that don't cause vein formation.

I have been trying my hand at jelqing (pun intended) on and off for quite some time, and never gained much, except for 0.2inch temporary increase that disappears whenever I take a few days off. I am sure I could gain extremely slowly over time, but the problem is that I really easily get new/larger veins, and it has come to a point where I do not want any more.

The veins are squiggly and unattractive, and because I dry jelq (I am uncut, so wet jelqing has never worked for me), the veins also get «stretched» so they become longer, which looks weird when I am not erect. I know some people say lots of veins just mean good vascularity and better erections, but I don’t see how veins in the foreskin aid erection in any way, because the blood in the tunica does not come from them.

Anyway, are there any exercises recommended for minimal amount of new veins? Like perhaps some type of squeeze, pressing the penis against a surface when hard, or something like that? I would like to add that the temporary changes jelqing does to my penis makes it more uniformly round, which I don’t like either. I like my dick to be a bit wider that it is deep.

Many thanks in advance!