I typically just use a shaving razor (Gillette Sensor Excel) because it's quick and easy. But when I'm going for a very thorough, very smooth result, personally I use Magic Shaving Powder. Like Nair it's a depilatory that melts the hair through chemical action to make it very easy to wipe away, but it's much more mild than Nair and doesn't cause any chemical burns. It's a powder that you mix with water to make a creamy paste, and apply to the area you want to remove hair. Wait about 10 minutes, then scrape the hair away along with the cream using a flexible scraper of some sort (I use a thin plastic ruler). You can find this stuff in the black men's hair care products in the shampoo aisle of your store. It's not specifically made for genital use, but it works very well for that purpose.