sunblock.  But it's still rude to stare. If you're not sure, watch the ocean.  Oceans are pretty.  However, never carefully avoid looking at people while holding out your hand to block accidentally seeing people with peripheral vision.  That would just look goofy, and besides, it's ALSO rude to accidentally bump into or trip over other people, regardless of whether they're naked. It's probably pretty hard to offend a nudist by looking at them.  If they're uncomfortable with being seen naked, they probably wouldn't be nudists.  Although I suppose they might have some sort of bizarre fabric allergy. Don't look at places you consider rude. Look anywhere except at those places you consider it "rude" to look at, which for most people is the genitalia for both sexes and the breasts for women. Of course, you're going to cast surreptitious glances but before too long you'll relax and be able to see whole people, not just body parts. That is, until some drop-dead gorgeous blond comes by wearing an itsy-bitsy bikini. Most people have average bodies and when you get a whole bunch of them all in one place, they become far less interesting than when just one of them is there in your bedroom.