You’re standing on the balcony, holding a sleek pod, exhaling a cloud that smells like mango-passionfruit, thinking: “At least there’s no tar going into my lungs like with cigarettes.” It makes sense. That’s what everyone thinks.

But there’s one tiny detail nobody likes to talk about out loud: your balls are vaping right along with you. And they really, really hate it.

The Study Nobody Wanted to Make a Big Deal About

In 2020, Danish researchers from the University of Copenhagen published a groundbreaking paper in Human Reproduction. They took 2,006 healthy young men aged 18–25 — regular guys off the street, not infertility clinic patients — and simply asked: who smokes cigarettes, who vapes, and who does neither.

The results were uncomfortable:

• Daily vapers had, on average, 22% lower sperm concentration than those who didn’t smoke at all;
• Total sperm count was down by a staggering 33%;
• The more often and the longer someone vaped, the worse the numbers got.

For comparison: traditional cigarette smokers did even worse (showing 30–40% drops), but the gap isn’t as massive as everyone assumed. In other words, vaping isn’t a “safe alternative” — it’s just a slower poison for the reproductive system.

Link to the full open-access study: Holmboe SA et al. Human Reproduction, 2020

Why Do the Balls Take the Biggest Hit?

Testosterone production and sperm creation are insanely fragile processes. They depend on precise temperature (that’s why the testicles hang outside the body), extremely low oxidative stress, and a microscopic balance of hundreds of chemicals.

Nicotine, propylene glycol, vegetable glycerin, and especially flavorings (yes, even your favorite mango-passionfruit) create a ton of reactive oxygen species when heated. These are the same free radicals that age your skin and damage blood vessels. In the testicles, however, they hit the Sertoli and Leydig cells directly — the exact cells responsible for feeding sperm and producing testosterone.

The result? Quiet, invisible inflammation. You don’t feel a thing. Erections might seem fine, and libido seems normal at first. But after 3, 5, or 7 years of regular vaping, sperm count and quality drop below the critical threshold, and by then it’s too late to ask “what happened?”

The Psychological Twist You Never Saw Coming

Here’s the really interesting part. Male sexuality is deeply tied to a subconscious sense of “I still got it.” You may not be planning on having kids right now, but somewhere deep in your brain, there’s a constant background scan running: “Am I fertile? Am I potent? Am I still in the game?” It’s an evolutionary mechanism older than conscious thought.

When testosterone slowly drops (even by a marginal 10–15% — you will definitely notice that), the very first thing that suffers isn’t muscle mass or beard growth — it’s drive and confidence.

You develop this weird apathy toward women, less initiative, and sex becomes “eh, it’s fine, we can skip it.” You might blame work, stress, or “getting older” (even though you’re only 27). In reality, your body just received a biological signal: “Reproduction is risky right now — conserve energy.”

Psychologists call this a somato-psychic effect: the body understands something is wrong long before the mind does, and the mind then starts inventing excuses after the fact. The scariest part? You don’t notice it happening because the changes are so gradual.

What Other Studies Have Found (Short & Sweet)

• 2023, Research from Turkey: Imaging studies suggest that vaping is linked to testicular volume reduction (atrophy) and structural changes in significantly high percentages of cases.
• 2024, USA: Common flavorings like cinnamaldehyde (cinnamon) and vanillin have been proven to be directly toxic to sperm-producing cells in laboratory settings.
• Animal Models: Mice injected with nicotine doses equivalent to 2–3 pods a day lost up to 50% sperm motility in just 30 days.

The Conclusion Nobody Wants to Hear

Vaping isn’t “safer.” It just delays the damage and makes it less visible. A cigarette hits your lungs and heart — you see the cough and feel the burn. Vaping, however, hits the part of male identity you don’t check in the mirror every morning.

So if you ever want to have kids without relying on IVF, or simply want to stay as hungry for life (and women) at 40 as you were at 25 — think hard whether that strawberry cloud is worth the quiet castration happening right now while you’re reading this and holding your pod.

Your body isn’t lying to you. It just doesn’t know how to scream — only whisper. And right now, it’s whispering very clearly.

Reference:

• Holmboe SA et al. Human Reproduction, 2020 Jul 1;35(7):1693-1701. https://academic.oup.com/humrep/article/35/7/1693/5869015

Take care of yourself. Not just your lungs.