Butterflies in my scupper

In ships, there is this hole that ejects water on the side of the ship called the scupper. And it’s referred as “a ship’s Vagina.” So butterflies in my scupper is like the human version of butterflies in my pussy. but for ships, it’s where a ship finds an other attractive ship that she has that tingling sensation in her scupper and she would like to date and/or sexually engage with that other vessel.

Oil Tanker: Man I have this huge crush on that sexy masculine tugboat. And as he was towing that big cruise ship, I was flirting at him and I then I have this butterflies in my scupper feeling.

Container Ship: girl, next time when he isn’t busy just go up by him and ask if he wants to go out on a date with you.

Cargo Ship: girl he’s so hot, I heard that he makes 3,400hp and his engine is the same one that is used on CSX and BNSF trains.