Summarize this article:

Whether you’re shaving or trimming “down there,” always keep in mind that you’re dealing with skin that’s extra-sensitive and often thinner and looser than elsewhere. Use your free hand to pull the skin taut before you pass over the hair with your trimmer or razor. This is especially important if you’re grooming the hair on your scrotum. Invest in a good set of grooming clippers and maintain them according to the product instructions. Make sure your razor is clean and sharp as well. Use the same techniques as elsewhere on your body--just work even more slowly and carefully! Use the trimmer to cut down on the length of your pubic hair. You can either leave it trimmed for a sculpted look, move on to shaving it for a clean look, or try a part-trimmed and part-shaved combination. There are many pubic hair styles to choose from, but it mostly comes down to personal preference. Generally speaking, though, the more interested you are in highlighting your “package,” the less hair you should keep. Never try to shave your pubic hair without trimming it down to 0.125 in (3.2 mm) or less first. The long, dense, curly hairs will get caught in your razor and you’ll end up yanking them out—ouch! Trim first, then shave using proper shaving strategies—warm water, lots of shaving cream, a sharp razor, short strokes in the direction of hair growth, a cool water rinse, and aftershave. Don’t skimp on the aftershave. Your skin is sensitive in this area, and will become very irritated otherwise. Reapply the aftershave for a few days afterward if needed. This is the hard-to-see (and reach) area between your scrotum and your anus. If you trim or shave the hair in your groin area, though, any hair on your perineum will become more noticeable. Cut it back to the same length as the hair in your groin area.  There’s no simple way to reach this area with a trimmer or razor. Standing up or sitting on the edge of the tub, the toilet, or a bench may work best for you. No matter if you’re standing or sitting, spread out your legs and use your free hand to both lift your scrotum out of the way and pull the perineum skin taut. Let’s be frank here—you don’t want unsightly hair growing out of your butt crack if you’ve gone to all the trouble of manscaping everywhere else. This, of course, isn’t an ideal place for a trimmer or razor. Instead, use an epilator, a handheld device that grabs and pulls out multiple hairs at once.  Yes, this will hurt a little, but remind yourself that it will complete your look! You can find epilators alongside trimmers and electric razors at major retailers. They may be located with women's razors and trimmers, but they're great for manscaping too!

Summary:
Pull the skin taut and work carefully, no matter your strategy. Start with a trimmer even if you plan on shaving. Shave, if desired, with a sharp razor and lots of shaving cream and aftershave. Trim and/or shave your perineum as well. Use an epilator to deal with any problematic hair on your backside.