Why did Pinkie buy a new submarine? Do ponies even have submarines? Why would her friends agree to come along on a journey? Is this all a flimsy excuse to write a bunch of ponies having sex and make a Beatles reference?

Warnings: The answer is yes to that last question. Also Pinkie has hair tentacles and makes physics cry.

Cover art found on derpibooru after searching for yellow submarine and being delighted to find that someone made this picture. Thank you deistar for making a bunch of weird PonyxBeatles photoshops and then disappearing.

Contest entry for Dirty Little Secret's Dirty Little Contest.