It’s real good to employ an electric razor in this area. Less chance of cutting your self in blind areas. And the narrower profile (Braun makes a thin razor) of the cutting head is ideal for getting into the gluttial crevice (butt crack). Use the electric razor first if you plan on also using a disposable razor. Electric razors work best on dry area.
If you’re going to use a disposable razor take a long, warm bath beforehand.
Before applying shaving cream, rinse area with cool water.
Apply shaving cream a few minutes before shaving to soften hairs. Consider using a sensitive product like Coochy Shave or Skintimate.
Be sure to use a sharp blade. You might try using two new blades if you are shaving a large area (no pun intended).
When shaving, stroke an area no more than twice to reduce skin irritation. On the first stroke, go “with the grain” to remove most of the hair, then go “against the grain” for a smooth, close shave.
Be sure to clean the area afterwards with soap and water to reduce the risk of infection. Ideally, give the area a second cleansing using cotton balls and rubbing alcohol.
Some people find daily applying baby powder or talcum powder especially helpful after shaving to keep the area dry and irritation free.
Go as long as possible between shavings to reduce skin irritation.
A great alternative is to use a product such as Nair or Neet. Waxing is possible, but you’ll likely need an assistant. See my instruction pages for these process’.