Scrotox: It’s Botox—the synthetic neurotoxin that blocks the release of a chemical signal from nerve to muscle, reducing muscle contraction—only, you know, for your scrotum.

You might not think guys would want to willingly inject the chemical compound into their testicles. But one board-certified plastic surgeon, John Mesa, M.D., says he has performed Scrotox on 15 men, and he anticipates that number to rise significantly in 2017.

Related: I’m a 32-Year-Old Guy Who Tried Botox. Here’s What Happened

Dr. Mesa, who refers to the procedure as “ball ironing,” says that more and more men are looking to seek the treatment for the same reason you’d want regular Botox: They want fewer wrinkles.

Since your testicles only function properly if their temperature is lower than your internal body temp, your scrotum relaxes in warmer conditions and contracts when it’s colder. Over time, this can cause a loss of elasticity and create wrinkles.

(See 10 Things You Didn’t Know About Your Penis And Balls.)

When you inject Botox into the scrotum, it smoothes the wrinkles, according to Dr. Mesa. It also allows your testicles to hang down farther, which Dr. Mesa says makes them appear larger.

But is that worth having a doc jab a needle into your boys?

“Technically, it’s more painful to get Botox in your groin than in your face because it is a much more sensitive area,” Dr. Mesa admits. “But we minimize that with a topical anesthetic. And once the numbing meds kick in, you won’t feel anything.”

Related: Your Balls Are Tougher Than You Think

Any guy over the age of 21 can have the procedure done, which takes around 40 minutes and costs between $500 and $800 per session, says Dr. Mesa. Like regular Botox, Scrotox lasts up to 4 months, he says.

But make no mistake: Absolutely no research has been conducted on the medical benefits or long-term effects of Scrotox, making it an entirely cosmetic procedure.

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