→Subscribe for new videos every day! https://www.youtube.com/user/TodayIFoundOut?sub_confirmation=1 →How "Dick" came to be short for 'Richard': https://youtu.be/BH1NAwwKtcg?list=PLR0XuDegDqP2Acy6g9Ta7hzC0Rr3RDS6q Never run out of things to say at the water cooler with TodayIFoundOut! Brand new videos 7 days a week! More from TodayIFoundOut Why Your Nose Runs When It is Cold Outside https://youtu.be/Dui38KQReRs?list=PLR0XuDegDqP01NqW8KRpOy-_y2m6S2VEF Why Does James Bond Like His Martinis Shaken Not Stirred? https://youtu.be/5t3U7QlSNlQ?list=PLR0XuDegDqP0GESJ0DgpgTcThLJVEbFs8 In this video: It’s very hard to tickle yourself because your brain anticipates things going on around you in order to help speed up response times. More technically, the cerebellum monitors body movements and can also distinguish between expected sensations and unexpected ones, generally resulting in diminishing or completely discarding expected sensations, while paying much more attention to unexpected ones. Want the text version?: http://www.todayifoundout.com/index.php/2010/08/why-it-is-nearly-impossible-to-tickle-yourself/ Sources: http://www.livescience.com/health/050628_brain_tickle.html http://en.wikipedia.org/wiki/Tickling http://www.msnbc.msn.com/id/3077386/ http://health.howstuffworks.com/mental-health/human-nature/other-emotions/question511.htm http://news.softpedia.com/news/Why-Do-We-Laugh-28974.shtml http://oreilly.com/pub/h/2832 http://faculty.washington.edu/chudler/funny.html