Dakota Johnson wasn’t monkeying around when she took a lie detector test for Vanity Fair that was posted Thursday. (Watch the video below.)

The “Materialists” star admitted to sending primate poop to a man in an act of revenge ― and the polygraph indicated the claim was truthful.

“You once sent a man who broke your friend’s heart a gallon of gorilla shit. Can you confirm or deny that this happened?” an interrogator asked off-camera.

“I mean there’s no way that he would watch this, so yes, I did do that,” Johnson answered. “It’s been some years.”

“How would one order something like that? Asking for a friend,” the interviewer followed up.

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“Shitsenders.com,” the “Fifty Shades of Grey” alum replied. “You can order any kind, any size.”

Whatever is happening in Johnson’s reported breakup with “Coldplay” rocker Chris Martin, let’s hope she isn’t thinking of mailing animal excrement.

Fast-forward to 7:10 for Johnson’s scoop:

Not to stir up anymore you-know-what, but HuffPost tried to visit shitsenders.com and we were redirected to poopsenders.com. “Always fresh. Always anonymous,” the slogan reads.

But the website is rather cagey about the composition of its caca.

To the FAQ “Is it real poop?” the company says: “Only the mad scientist that packs this stuff in the back room knows for sure and he wouldn’t tell us, but we do know this, it really smells bad back there, he is mixing up shit, and he does visit the local dairy farm and zoo about twice a week. (We also don’t want the delivery company to actually know what kind of shit they’re delivering.) We can assure you that it looks nasty and really stinks. It will get the point across to your intended victim.”

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