LONDON -- When it comes to Snapchat,домашние видео порнография you have to take what you see with a pinch of salt.

Because outside that vertical little window, who really knows what's going on?

On Monday, James Greator perfectly summed up this phenomena in one viral tweet:

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Yep: what looks like a dark, sleepy shot of a man lying beneath a duvet is only a couple of coats and a filter away from what's reallygoing on.

In just over a day, Greator's tweet has already been shared a whopping 45,000 times.

Many people seemed to empathise.

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Others, meanwhile, were less impressed.

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On Monday evening, Greator -- presumably being inundated with angry tweets -- posted the following update:

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Still, it'd be interesting to know how many people are currently attempting this trick.