Kristen Bell's hubby got a vasectomy without her approval. She was not amused.

Dax Shepard loves his two kids. Dearly. But the thought of a third was enough to send him sprinting to a urologist.

Appearing on Jimmy Kimmel Live, the 41-year-old actor told of his extreme, snip-happy response to his wife Kristen Bell’s recent pregnancy scare.

“Last year, my wife was working in Atlanta. We were there and she all of a sudden goes, ‘Oh, my gosh! I’m so stupid. I’ve been sick for 10 days and ignoring it. I’m definitely pregnant’.”

With Kristen at work, unable to take a pregnancy test, Dax spent a torturous eight hours envisioning his life with another little Shepard in his flock.

“We already have no life! This is going to be not worth living. I freaked out. It was so bad,” he told Kimmel. “That was Tuesday. I flew home Wednesday for a meeting. Thursday morning I had a vasectomy.”

Unfortunately, having the taps turned off wasn’t exactly the proactive response his missus had in mind.

“Kristin was not thrilled that I did it so quickly, but I’m a man of action, and so I was in and out. I was back in Atlanta two days after that shooting a Samsung commercial.”

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Apparently oblivious to the concept of oversharing, Shepard continued his vasectomy story with an illuminating anecdote about masturbating in his car.

Yep.

Part of the procedure includes a follow-up appointment to ensure that the sperm is sterile. Without accommodation at the clinic to, erm, procure a sample and just 15 minutes to get there, Shepard was forced to improvise en-route.

We’ll spare you the details (watch the video above if you’re so inclined), but let’s just say it involved a traffic jam, a twisty highway and a mason jar.

“It’s hard enough to get through that road while not making love to yourself into a container,” Shepard said. “Anyways, the great news is I’m sterile.”