Why Do You Feel Butterflies in Your Stomach?

It may have happened when you locked eyes with your secret crush, or before an important job interview, but what exactly caused that strange, fluttering sensation in your stomach? Hosted by: Hank Green Head to https://scishowfinds.com/ for hand selected artifacts of the universe! ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Lazarus G, Sam Lutfi, Nicholas Smith, D.A. Noe, alexander wadsworth, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.msdmanuals.com/en-gb/home/brain,-spinal-cord,-and-nerve-disorders/autonomic-nervous-system-disorders/overview-of-the-autonomic-nervous-system https://news.nationalgeographic.com/news/2006/03/0307_060307_human_prey.html http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0152284 https://www.ncbi.nlm.nih.gov/pubmedhealth/PMHT0025458/ https://www.ncbi.nlm.nih.gov/pubmedhealth/PMHT0025459/ http://theconversation.com/explainer-why-do-we-get-butterflies-in-our-stomachs-72232 https://link.springer.com/chapter/10.1007/978-1-4939-0897-4_3 https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-2982.2012.01906.x