Chairgasms or Unconventional Orgasms

Seeing advertisements for chair yoga makes me laugh. In college I remember sitting in my tiny painting studio one day and lifting myself up by my arms straight legs in an L shape all from the seated position. The result was an orgasm. So I did it again! and again! I call it a chairgasm. I have compared notes with men and women about this and other methods which caused this sensation for them: chin ups, dangling from trees, climbing ropes, parallel bars, rings, riding a skateboard stomach torso on the board, leg lifts, or just walking.  I found this article today. Different but same name. And this.