Ok, imagine you are not a nudist. What would you do if you walked into your friends pool area and found him nude knowing he is a nudist? Not doing anything sexual, just nude. Laying on a float, swimming or laying in the sun. Would you; Expect him to cover up? Ask him to cover up? Ignore the fact he's nude? Strip and join him? Wait for his wife to show up before deciding? Leave? What? Why?
Oh, that's a difficult question, really, since I'm almost unable to step into a non-nudist's shoes, being both a nudist and a barefooter... The most natural reply to me (as I am now) would be "Strip and join him". However, since I'm challenged to pretending to be a non-nudist, I'd go for "Ignore the fact he's nude" - and after seeing him (and others around him) being casually nude and happy that way, I might then eventually strip and join him after a little while. Wiggling nude and happy toes, ~*Ganesha*~