In a 1993 experiment, volunteers held a hand in 14 °C water for 60 seconds. In a second trial, they endured the same 60 seconds plus 30 more as the water warmed very slightly. Asked which one to repeat, most chose the longer ordeal. Memory judges an experience mainly by its peak and its ending, not by how long it lasted.
Remembering is not replaying a recording — it is rebuilding. Each time you recall a memory, it becomes temporarily malleable and can be altered before being stored again. That is why two people can sincerely remember the same event… differently.
In 2003, Johnson and Goldstein compared European countries. Where you must tick a box to become a donor, consent rates ranged from 4% to 28%. Where you're a donor by default unless you opt out, they topped 85%. People aren't more generous on one side; most simply stick with whatever option was chosen for them.