"Crap!" You don’t know why, but you really have to go to the bathroom, Your bowels feels like they are full and close to releasing their contents. All of the other people look like they are fine, but you are the only one suffering. As soon as the ship reaches the island, you rush for the nearest bathroom stall. You find one, but what you find inside it is not something that you expected to see.
Inside the bathroom stall, you find what looks like a nest for eggs. You think that this is wrong and humiliating, you are a human boy or a man. There should at least be a toilet but there is not. Even worse the door is now locked; you're stuck in it. They can't really be expecting for you to poop into the nest, can they? But it seems that they are giving you little choice.
You were raised to be a proper boy or man, so you are not allowed to soil your own clothes or the ground, so you have no choice but to take off your pants and underwear and squat over the nest. You try to release your shit, but it feels painful, hard, and not easy to squeeze out, after a long time of hard labor of trying to get whatever is in you out of your butt, it eventually does come out and into the nest. When you look down you see that what came out of your butt is a Chicken’s egg.
"AHHHHHHHHHHH!" You think to yourself. You have just a laid a big Chicken’s egg out of your human boy or man’s anus. You can't let anyone know that you did this. You have to get out of here, but the Boat to go back home won't be back for another month.