Deanna Troi: It's tradition, Worf! You of all people should appreciate that. Worf: I will not do it! Jean-Luc Picard: Won't do what, Mr. Worf? Worf: Captain, I do not think it is appropriate for a Starfleet officer to appear... naked. Jean-Luc Picard: Oh, come now. A big, handsome, strapping fellow like you? What can you be afraid of?

Worf has misgivings about following a tradition that requires him to strip.