Why cum burns when a guy nuts inside you

To borrow a coined phrase from Coco Peru, “It Burnnnns…”

Have you experienced cum burns? Not everyone does, but it can be worrying for people who do experience it.

First, let’s just make it clear that I’m not here to make a judgement on anyone’s sexual practices or preferences. I’m sure so many people reading this will be saying, “wear a condom” well I’m not here to shade anyone’s sexual health decisions. But you should definitely read up on PrEP and UEqualsU if you’re planning to have sex raw.

The butt is a wonderful area of the body and there’s so much fun to be had from it, but there are questions that linger and they’re mostly to do with pain, like why do I bleed after anal sex or why does it hurt when I get fingered. But another question is why cum burns your insides after a guy has cum inside you.

Let’s not forget the ass and the rectum is a very sensitive area and is packed with nerve endings and blood vessels, which is why playing with it feels so darn good!

It’s a question that was posed recently on the AskGayMen Reddit by a user who asked,

“Why does it hurt after a guy cums in you like it feels like a burning sensation, only hurts while being fucked again? Does anyone else have this?”

So the question isn’t so much that the cum actually stings whilst it’s sitting inside you, it’s more that if you’re being fucked again that it can sting.

Well there are a couple of reasons why cum might be stinging you.

Why cum burns

why cum burns in your ass

It’s not lube

Firstly, although it’s many of our fantasies to use cum as a lube, the basic truth is – it’s not lube. It really doesn’t have the lasting power that lube, designed for butt play has. (Btw we totally recommend silicone lube). Spunk can dry up quicker – particularly with friction, you can find this out for yourself, the next time you cum try rubbing it against your skin. You’ll see that it dries up pretty quickly.

Tears and fissures

Next, it might be stinging you because you have tiny, micro-tears in your rectum and if the cum is going seeping into those it can be a bit like salt in a wound. You might also have an anal fissure, which can take some time to heal, which will also cause you pain… even when you poop.

Semen actually contains a number of elements including citric acid, fructose, lactic acid, magnesium, zinc, potassium, sodium, fat and protein many of these can cause a stinging sensation if left on an open wound.

Allergy

Thirdly you could actually be allergic to semen. Yes, that’s actually a thing. Although semen allergy mainly affects women, it can also affect men.

According to the International Society for Sexual Medicine, “Some common symptoms of sperm allergy are redness, swelling, pain, itching, and a burning sensation”

Mr. Man

So what are you actually allergic to? Well according to the site, it’s essentially an allergic reaction to the proteins found in semen.

It goes on to suggest that those symptoms can start happening after 10-30 minutes after the introduction of semen to your skin and their effects could last hours or even days. If you think this might be the reason for the burning sensation it might be worth booking an appointment with your doctor. Otherwise douching after sex might be the solution. Be gentle with the area as you don’t want to add more trauma to the area. Use lukewarm water – and a bulb douche rather than a showerhead douche.

As with all thing medical, it’s always best to speak to your GP or doctor or ask when you next go for a sexual health check-up.

Don’t forget if you’re having sex without a condom to look into taking PrEP which is the anti-HIV drug and also to know your own HIV status. While PrEP can protect you from getting HIV it won’t protect you from other sexually transmitted infections.

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