In reference to a toilet. Due to the fact that most toilets are white like pearls. Also hinting toward the fact that harbors are surrounded by water meanwhile toilets are filled with water.
Example 1. "Dude, I just docked an aircraft carrier in Pearl Harbor."
Example 2. "OMG! I need to get to the bathroom soon, the Japanese are about to bomb Pearl Harbor!"
An excuse for teenage couple's to make out in the presence of parents. Such as when a mom or dad yells downstairs and asks why it's so quiet, they need only to respond back by saying, "We're having a moment of silence! It's Pearl Harbor Day!"
Joe: "Hey man how'd it go with Chrissy the other day?"
Steve: "It was pretty nice. We celebrated Pearl Harbor Day for a bit in my basement."
After performing the act of docking the role of a malehomosexual who gets banged in the ass by an uncircumsized man while giving head to another uncircumsized man then switching them .
Teddy was the harbor master for Guillermo and Spencer's sexual antics. Playing the switch hitter game to make it interesting