I have been shaving my head for 25 years and use Gillette Proglide ($28 for 8 amazon). The key for me is the vibrating handle. Smooth as a baby butt and no irritation.
My son when he was 3-4 said he was an old man named Bill. I would ask him how he knows he was an old man named Bill? He would tell us he climbed out of his grave as a baby.....