After you blow your load inside a chick's ass, you piss in her ass with your barnacle cock, and it lubes up clumps of shit and the clumps slide out like submarines into the yellow water.
"Holy shit Sam, did you hear about Nick and Heather last night? He drowned her gaping ass in his piss and made some yellow submarines.
When you peel a banana, take the peel, shit in it, and then you insert it into the vagina, then you squeeze the peel, causing the shit to leak into the vagina.