Just an FYI, the German word for naked is "nackt", not to be confused with "nacht", which means night. Which might not seem important, unless you, like my sister in law, accidentally signed up for a "nackt wandelen" or "naked hike", as opposed to a "night hike" at her daughter's university (Freie Universität Berlin) when she went to visit her last year.

Fortunately her daughter saw the mistake long before they attempted to attend. I can only imagine the scene had she not discovered the mistake before showing up!!! :)