Josh Duggar is from Arkansas ... so it's totally cool if he dates his siblings.
Back in 2008 -- long before Duggar's molestation past came to light -- he made a quip during an episode of what was then called "17 Kids and Counting."
Josh describes a double date scenario with his then-fiancée Anna ... he ended up going with 2 of his siblings.
Josh explains, "We chose Jana and John David. We thought why not, have a double date ... We are from Arkansas!"
He then broke out in laughter.
Not so funny now ...
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