I shave mine in the shower usually once a week cause I'm lazy. Mach 3 razor and whatever soap I'm using on my body. Shave against the grain for that silky smooth head.
I've had a couple barbers do straight razor shaves, and I've never been as happy as I am when I just do it myself.
I found any of the razors with more than 3 blades just plug up more, so i just get mach 3s at Costco.