Jamie Oliver might be known for The Naked Chef — but he does not encourage cooking in the nude. On this morning’s episode of The Drew Barrymore Show, Oliver recalled the time things went horribly wrong when he tried to surprise his wife on Valentine’s Day.

According to the British chef, the incident occurred shortly after he upgraded his kitchen — which included the installation of a “lovely” fan-assisted German oven. He said he put a seasoned sea bass in the oven, lit some candles to set the mood and laid the table, before telling Drew Barrymore, “Oh, yeah. I forgot the bit. I was naked.”

“I wanted to dress it up a little bit for various reasons,” he added, referring to his penis. “I put a bow around it. I was being creative! Don’t judge me!”

But Oliver soon learned how bad of an idea it actually was. When he opened his oven, he said the “fan assistant” let out a “shot of steam” that hit him right on his crotch.

“Boys, you wouldn’t believe — like, the size of a tennis ball. Unbelievable,” he recalled of his injury’s aftermath, before looking around the audience and saying, “Oh no, look at the faces in the room!”

Despite the looks of horror, Oliver continued, “I basically spent the whole night, which was gonna be great, with frozen peas on my crotch.”

While Barrymore was busy laughing at his flub, Oliver advised the men in the room to never cook naked.

“That is a true story,” he said. “For the fellas, what was amazing is I’ve never had pain so bad in all my life. Never, ever cook naked. That is a public service announcement. Don’t do it. Not even for Valentine’s Day.”

Luckily for Oliver — who hosted The Naked Chef cooking show from 1999 to 2001 — his wife didn’t run for the hills. In fact, they’ve been together for about 30 years and share five children.

The Drew Barrymore Show airs on weekdays on CBS. You can check the website for local airtimes.