An image has gone viral online as fans spotted a rude optical illusion.
The innocent picture, which shows a hotel notice, invites guests to sit back and relax.
It informs visitors about the security of each room which has a safe for their valuables.
READ MORE: Colourful optical illusion has hidden number – but half of people can't find it
The sign reads: "Enjoy peace of mind," as it recommends guests to relish a stress-free visit.
It has a picture of a man reading, but people have spotted an X-rated take on the image.
So can you see why it's got people talking?
Many social media users claim they can see the outline of a woman with a ponytail performing an oral sex act on the man.
Don't worry if you can't spot it as those who did might just have a dirty mind…
In other optical illusions, a tricky image baffled the internet as it shows woman waiting at airport.
It has a female waiting at a German airport while wearing black jeans and a pair of Vans trainers.
The woman wore her hair up in a ponytail as she sat cross-legged on a seat at her boarding gate.
When you look at it first, it seems as though the traveller has an extra leg but there's someone sat beside her.
Looking for more tricky images? Previously, a mind-boggling optical illusion could determine your IQ score if you can work it out.
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