A group of young men use a selfie stick to take a picture of themselves in shallow waters known as the first cataract of the River Nile outside Khartoum, Sudan, May 22, 2015. In Sudan, which faces insurgences in the western region of Darfur and along its border with breakaway South Sudan, as well as double-digit inflation and high unemployment, life goes on for young people in the capital Khartoum. (Photo by Mohamed Nureldin Abdallah/Reuters)

Everyone wants to get something for nothing - whether it's a lucky upgrade that means you can turn left when you get on a plane instead or heading off into the economy seats, or even getting a few extra features thrown in for free when you buy a new car.

As some of the sharpest businesses around, no-one understands this quite as well as casinos and that's why they all have a system that they call comps. It's short for "complimentary offers" and these are special treats specially designed to reward you for your loyalty to the casino in question. They're basically bonuses.

Hikaru Cho believes that we should challenge our imaginations to create new work using traditional tools, not fancy computers and software. (Photo by Jim Marks/PA Wire)

Artists perform as people watch from the safety of their cars, during the Art Parking drive-in festival in Prague, Czech Republic, Sunday, April 26, 2020. Artists in Czech Republic are finding different ways to perform as regular theaters remain closed in an effort to stem the spread of coronavirus. (Photo by Petr David Josek/AP Photo)

Two wolfhounds take part in a dogfight in a stadium in the Kyrgyzstan capital Bishkek on November 5, 2017, during fights organized by a local breeders aiming to improve the Asian Shepherd breed, organizers said. (Photo by Vyacheslav Oseledko/AFP Photo)

Moby – Natural Blues (Reprise Version) ft. Gregory Porter & Amythyst Kiah (Official Music Video). Richard Melville Hall, known professionally as Moby, is an American musician, songwriter, singer, producer, and animal rights activist. He has sold 20 million records worldwide.

Viagra Boys – Ain't Nice. Viagra Boys are a Swedish post-punk band from Stockholm. In 2018, they released their first album, Street Worms. Nils Hansson, a journalist at the newspaper Dagens Nyheter described the band favorably, praising their musical style, as well as their use of black humor and satire, and rated the album a five out of five. In 2019, the band won the Independent Music Companies Association (IMPALA) Album of the Year Award for Street Worms.

These are some of the Real Doll bodies made by Abyss Creations being assembled in the factory on Tuesday, September 12, 2017 in San Marcos, California. Customers can dictate their partner’s character by choosing between 18 personality traits including shy, sensual, jealous, moody or talkative. (Photo by Eduardo Contreras/San Diego Union-Tribune via ZUMA/Rex Features/Shutterstock)