Well I'm getting a vasectomy in February and I may not wait till the week of the appointment to shave. As soon as I get all the goodies (good soap, lotion, new razors) I'll get going on it. I already use Mach3 razors
People keep bringing up separate razor for face and crotch and no one says why. The only reason I can see is that your crotch hair is thicker than the hair on your face and your razor wont do such a good job on your face after.