It will happen at some point. Every time I teach with SL, and whenever I go to work on Orientation Island, I get this cry for help: "I"m naked! Where are my clothes! Help!"

You will either accidentally remove all of your clothes or, for some reason, you will have them on and, while others will see your avatar fully clothed, on your screen you will see yourself buck naked.

If others see you nude, you may be banned from a region.  So if you remove your clothes by accident, go into your Inventory's clothing folder and put something on, quickly.

Sometimes avatars just stand around and change their clothes in public. That's something newcomers are more likely to do, and it sets you up for some kidding by experienced residents. Go to a private place to change!

If you but not others see you as nude, you'll have to do a bit of SL magic, in this case "rebaking" your avatar's textures.

How to do that: Open the "advanced" menu by selecting

Final advice from an expert of nudity, Pappy Enoch: "Chirren, I luvs tu see purty gals wif out no clothes on.  But it kin happen, like yo' perfussur says, by accerdent.  So hear am TU bits o' advize:

WUN) if'n it du, corn-tack me for an empty bar'l tu are (If'n that am good enuf fo' Orhalla Zander, the Hobo King, I reckon it are good enuf for yu

TU) "naked" n' "nekkid" am tu differunt thangs.  "Nekkid" means yu ain't got no clothes an' am up tu sum'fin.  Don't go a-doin' that in Secund Life.  The fake wirld gots enuf preverts alreddy.