Anal hair frequently develops during puberty around the opening of the rectum. Oct 9, 2. If you just want to shave your cheeks, then you can use the shaving head to achieve a closer shave, but you won't be able to really use this unit "between the cheeks. Colorofant , Oct 9, Additional Information While you're at it, you might also be interested in my article about how to shave your genitals. I don't shave butts, but between them it's imho quite good to be clean. Brave Soldier Shower Shave is an excellent product to use to shave your buttocks.