Every time I shave my face (2-3 times weekly) the boys and the base of the shaft get the razor too.
I also use the chemical hair remover in between my thighs, ass, and below my balls. The skin is too thin for the chemical remover on my balls and I have burned it twice in a row.
Trim the chest and armpits with a hair trimmer when I buzz my head just to keep the unruly hair manageable.