I use the Gillette fusion 5 blade. It has a single blade sideburn trimmer on one side and I use this for balls/ shaft. A single blade does not cut as close as the 4 blade side. Shaving too close leads to ingrown hairs which are unsightly and painful. Definitely use a good shave cream/ gel, preferably one for sensitive skin. Don’t shave every day, a couple times a week is probably enough, again to avoid ingrown hairs. Don’t shave the pubes above the dick, tried once in the past and got horrible ingrown hairs. My skin can’t tolerate it. Just do a light trim to cut back some of the forest, makes the tree look bigger. 
