What is a Rainbow Kiss? Meaning, Risks, and TikTok’s Obsession Explained (updated for 2025)
Curiosity killed the cat — and it might’ve ruined a few appetites too. If you’ve landed here after hearing about the “rainbow kiss” on TikTok, you’re not alone. The internet has been spiraling over this shock-value sex term, but what does it actually mean?
Let’s break it down — clearly, honestly, and with a little cultural context.
🩸 So… What Is a Rainbow Kiss?
A “rainbow kiss” refers to a sexual act where two partners engage in oral sex — one while menstruating and the other culminating in ejaculation — and then kiss, sharing the mixed bodily fluids. The “rainbow” metaphor stems from the mingling of blood and semen during that exchange.
It’s niche, it’s graphic, and it’s sparked everything from fascination to disgust online.
📱 Why Is It Trending on TikTok?
Like many NSFW terms, rainbow kiss recently blew up across TikTok, with users issuing warnings like: “Don’t Google it!” or reacting to the definition with mock horror.
This kind of viral curiosity loop — equal parts sex ed and shock bait — is part of a growing trend where niche sexual terms go mainstream thanks to social media’s appetite for taboo.
👩⚕️ Is It Safe?
According to Dr. Wendasha Jenkins Hall, a sex educator quoted in Women’s Health, the act falls into a category of sexual expression involving bodily fluid play — and, like anything in that category, it carries some risk.
“Rainbow kisses are not for the faint of heart,” Dr. Hall says. “This is a next-level sexual act.”
There’s potential for the transmission of STIs through blood or semen, so anyone considering it should:
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Practice good hygiene
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Use protection when necessary
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Engage in open, informed conversations with their partner(s)
Dr. Heather Irobunda, an OB-GYN, emphasizes that “menstrual blood can carry infections” and that “mutual consent, boundaries, and safety are key.”
❓FAQ: People Also Ask
Is a rainbow kiss dangerous?
It’s not inherently dangerous if both partners are healthy and informed — but there is a risk of STI transmission, so safety matters.
Is it a real thing or just internet myth?
It’s real — though extremely rare. Most mentions stem from online forums or sex-ed shock value rather than common practice.
Where did the term come from?
It likely originated in sex-positive or kink circles, before gaining meme-like notoriety on platforms like Urban Dictionary.
Why is it called a “rainbow” kiss?
The term plays off the mixing of red (menstrual blood) and white (semen) — though technically, the rainbow metaphor is a bit of a stretch.
🧠 So… Should You Try It?
That’s entirely up to you. Sexual expression is personal, and as long as it’s consensual, informed, and respectful — it’s valid.
Still, for most people, the appeal of a rainbow kiss lies more in the reaction than the reality. It’s the kind of thing that shows up in a “WTF is that?” group chat, not necessarily the bedroom.
🔗 Final Thoughts
Rainbow kisses aren’t new, but they’re a prime example of how sex slang goes viral — and how conversations around sex, bodies, and kink are evolving in public view.
Whether you’re here to learn, laugh, or just satisfy your curiosity, knowledge (and communication) is always the sexiest part.
If you’re picturing a multicoloured lipstick shade, a fruity cereal, or a rainbow kiss ice cream flavour, we regret to inform you that you’re way off on what it means to kiss the rainbow for real.
So what’s a rainbow kiss exactly? Well, right now, if you search the phrase rainbow kiss on TikTok or Google, you’ll probably encounter a rainbow kiss video or two, and if you’re really (un)lucky, even some rainbow kiss pictures. What you’ll also probably come across is a bunch of TikTok videos, where people warn you not to look rainbow kisses up. But, if you’re still curious then read on – we’ve rounded up all the info on a rainbow kiss so you never have to ask what’s a rainbow kiss again.
Like most avant-garde fetishes, the rainbow kiss evolved from a more mainstream sex act – think of the classic 69 position, but with a ‘colourful’ twist. What makes the rainbow kiss sexual in a very polarising way?
“You’ve heard the term ‘running the red light?’ This is a level up from that,” writes Dr Wendasha Jenkins Hall; founder of The Sensible Sexpert.
If you’ve got no idea what is a rainbow kiss definition then Dr Hall is referring to the act of performing oral sex on a female partner, in the 69 position, while they’re on their period. And while ‘period sex’ is not a foreign concept to many, here’s the kicker when it comes to the cloudy rainbow kiss part…
“Once both partners have ejaculated in each other’s mouths, the couple kisses, mixing menstrual blood with semen in the process, thus the ~rainbow~ part of the rainbow kiss. And voilà!” write Cosmopolitan.
Well, there you have the rainbow kiss def finally. A rainbow kiss essentially involves swapping menstrual blood and semen via lip-to-lip contact. To put things lightly, the special rainbow kiss embrace is not everybody’s cup of tea.
But according to Dr Hall, the rainbow kiss is only one of many sex acts people with bodily fluid fetishes perform. And it’s not a new concept, either. So why has the phrase experienced a viral resurgence via TikTok in recent months? Just check out a rainbow kiss TikTok which is one of many below.
@tr1pofficial Read the last sentence 🤢 #funny #twitch #streamer #google #reaction #cod #mw #coldwar #warzone #fyp #tr1p #lol #videogames #game #gamer #gaming #clip
Since late last year, people have been chronicling their rainbow kiss TikTok journeys, revealing what they thought a rainbow kiss means versus what a rainbow kiss actually is.
“I thought it was bout to be sum fruity bro…” wrote one user in the caption of a rainbow kiss TikTok posted in 2021.
Look, we’re not here to rainbow kiss kink shame. If french kissing your beau is getting a little boring and you want to mix things up with a rainbow kiss then more power to you. However, there are additional health risks associated with the rainbow kiss, so it’s important to prioritise safety if you’re planning on giving someone a rainbow kiss anytime soon.
“Semen and period blood can carry lots of different infectious particles, such as HIV, syphilis, and hepatitis,” warns Dr Heather Irobunda, a licensed ob-gyn about the rainbow kiss.“If you are unsure of your partner’s STD status, you should not be sharing rainbow kisses. But if all partners are actively testing and they understand the boundaries and offer their consent, then it’s typically safe.”
Of course, like every sex act, consent is key. As Dr Hall explains, the rainbow kiss is “typically done among partners who take these safety precautions—they’re not done with a person on the street or a person on an app. It’s not a one-night stand kind of thing.”
She continues, “there has to be some consent around what’s going on, there has to be safe words, limitations, and hard boundaries because of the disease and illness factors.”
So, if you’re thinking of joining the rainbow kiss club, we hope this cleared up some of the mystery surrounding this viral fetish topic.
And if you’re feeling nauseous, sorry! We hope you can erase this rainbow kiss article from your memory.
