Think whoever made it saw it as "Black man:Go" judging by the caption. Who would refer to a mango as "he"? Plus why would it question his desire to stay when you think it's jus referring to it as a black mango? Your way doesn't make sense at all...
Admittedly, I haven't watched much Futurama. I have too much other shit going on with Doctor Who, Naruto, countless books, and school. I plan on watching it, but haven't gotten around to it yet, so if there is some underlying joke, it is lost on me.
*Fry meme*
or just trolling.