People who voluntarily undergo a great deal of pain, discomfort, or effort to get something will be happier than if it came to them easily. This is called the "IKEA Effect".
The IKEA effect is a cognitive bias in which consumers place a disproportionately high value on products they partially created. The name derives from the name of Swedish manufacturer and furniture retailer IKEA, which sells many furniture products that require assembly.
The IKEA effect has been described as follows: "The price is low for IKEA products largely because they take the labor out of the equation. With a Phillips screwdriver, an Allen wrench, and a rubber mallet, IKEA customers can very literally build an entire home's worth of furniture on a very tight budget. But what happens when they do?" They "fall in love with their IKEA creations. Even when there are parts missing and the items are incorrectly built, customers in the IKEA study still loved the fruits of their labors.