You're better off using hair removal cream rather then shaving - it's faster for one thing, although make sure you follow the instructions. You'll still need to shave some bits but it's much better than having to shave your entire body. To make sure you don't get ingrowing hairs you need to exfoliate the skin on a regular basis. I've had them before and they are no joke - a couple of friends of mine (non-TV guys I know) have ended up in hospital having to have large and painful boils removed as a direct result of ingrowing hairs.