The YouTube tutorials that are giving people 'brain orgasms'.

Ever wondered how the sound of someone’s voice can turn you on? Well, you’re not alone.

A growing number of people have reported experiencing autonomous sensory meridian response, or ASMR, after watching video tutorials of the softly spoken Maria on YouTube.

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ASMR – known colloquially as ‘brain orgasms‘ – is described by the Neuroscience blog as a pleasurable and calming tingling sensation, generally experienced at the back of your head.

The softly spoken Russian woman - who currently lives in the United States - has been described as the "star of ASMR". Her videos, which are published under the 'GentleWhispering' YouTube channel, include everything from tutorials on household tasks such as folding napkins, to role plays of Maria fitting a suit.

Maria, who has over 500 000 subscribers, first experienced ASMR as a young child and describes the sensation as like "a shower of sparkles".

“It’s like warm sand being poured all over you, trickling over your head and down into your shoulders. It’s like goosebumps on your brain,” she told the Washington Post.

Maria has been filming ASMR videos since 2011, and her 'Relaxing Towel Folding Tutorial' has been viewed over 1 million times. The 18 minute video, which shows Maria instructing her fan base how to fold towels, is incredibly popular within the ASMR community.

Watch Maria's towel folding tutorial here (and brace yourself). Post continues below.

While the videos may seem mundane to the standard viewer, the ASMR community often gather on Reddit and other online platforms to discuss the condition and share popular methods of triggering the response.

Mental Floss says that the most common triggers include educational videos (such as Maria's tutorials), hair cuts, music and art, close eye contact and feeling empathetic.

But while the validity of the condition is still disputed within the science community, Steve Novella, the director of general neurology at the Yale School of Medicine has written that ASMR may be caused by small seizures that are triggered by auditory cues and has urged further research into the phenomenon.

And if the sheer volume of people who report to being affected by the sensation are anything to go by, that research might be warranted.

DId this video give you a brain orgasm? Let us know in the comments...