Probably best to have a groomer (one with some years behind them) show you. Even with experience and a very well behaved dog (would be lovely if they all acted stuffed during grooming but no such luck, lol) that's an area where injury's and irritation commonly occur just because of what your doing and where your working pretty much even though it's best to have it done. Aside from those obvious sensitive area's (nooks and cranny's and such) the inside of the rear leg's tend's to get scraped and cut and burned easily.