First do clippers. Preferably with "protecting" head on em but not necessarily
Now take out your balls, and make it be kind of chilly, you want them at least slightly contracted
foam them up, take out the mach 3 or wilkinson or whatever as long as it has a series of blades and a flexible head...
grab your sack in one hand and squeeze slighlty so that the other side becomes slightly tight. now just shave... once you do a bit you see its really very safe and relaxed.