Props if it's a genuine furry joke, not a human one rewritten with furs. Double props if it's one only e621 will get.
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A fox came home one day to two vixens laying in his bed. Both girls were identical in every way, size, color, dimensions, everything.
He rips off his clothes, jumps on them and starts furiously fucking them both.
"Hey, slow down!" One vixen says. "What's the rush?"
The fox says "I'm trying to bust a nut before one of you gets flagged for deletion."
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Okay, not the best, but that's mine.
Updated by Clawdragons