Rule34https://rule34.xxx/index.php?page=atom&tags=2015 ambiguous gender animal genitalia animal penis anus ass ass up backsack balls barn canine canine penis digitigrade duo equine erection feral feral on feral hay heart horse horse-loving dog (marimo) interspecies ladder lying male male/ambiguous mammal manmosu marimo penis perineum quadruped raised tail rear view size difference smaller male tailwag2024-04-30T10:22:49ZRule34