In the middle ages people blamed demons for their many different troubles, Sitri being the culprit for public nudity amongst other things...
Sitri Made Me Do It!
Back in the middle ages there was a demon for just about everything. There were demons for foul language, eating too much, being too rational, causing war, causing love, causing hysterics, madness, drinking, hunger, getting lost, annoying old women... pretty much anything a person could desire in order to shift the blame for something away from their own responsibility.
Sitri (aka Sytry, Sitry, Bitru) is one such demon, a demon prince no less, one that commands legions of lesser demons but when he is bored he likes to mess with the intimate lives of humans.
He is capable of making people fall in love (generally creating situations of infidelity), revealing peoples personal secrets (mainly womens, in order to mock them) and also to cause people to show themselves naked.
So you ever find yourself in one of the above situations you can always 'blame it on Sitri', however I am not entirely sure many will buy into it.
How many of your friends could chalk a few bad decisions up to Sitri?