I'm a 23yr old male and I - same as many others - experienced orgams by climbing poles during childhood (compare eg. http://www.flickr.com/groups/41373909 @N00/discuss/72157603694027715 / as well as countless other threads).
There are even youtube profiles going with this specific topic only:
Now I "lost" this ability by simply not doing it anymore once I turned 12 or so and discovered regular masturbation. However, about 2 years ago I tried to re-learn the technique and now I am able to orgasm by climbing poles, doors (compare:
It took quite some effort. Im sportive but not as light weighted as I was in my childhood, so it takes more effort. Back then I could just come like 30 times an hour nonstop climbing a pole, those days seem to be gone, it still works more often than during normal masturbation / intercourse.
Now I searched some more and came across this other topix thread: http://www.topix.com/forum/news/sex/TC4VGORTL...
This method seems REALLY close related to the physical motion you do by climbing a pole. Most people report of having to hold onto something and squeeze their legs (compare http://www.youtube.com/watch... for exact technique on pole and http://www.youtube.com/watch... for the syntribate version).
There is also a website dedicated to "syntribating", this special form of thigh squeezing: http://syntribate.com/
Other (non-free) videos of the thigh-squeeze technique:
http://www.hegre-art.com/films/show/371... (hottest vid ever?)
There are also people reporting having orgasms in the gym during leg squeezes / ab workout or the roman chair, which again seems really related to the "pressure on groin area + straining arms" way of masturbation.
Now I should probably come to a conclusion about why this is possible, but I really have no idea. I just know the orgasms are different (maybe better, not sure, bit more intense) but my best guess is that is was natures way of giving women a faster way to orgasm during intercourse. That may sound really stupid but its all I got.
I'd appreciate any further vid-recommendations, also stories about the mentioned ways and basically anything that could bring a bit more input to the whole subject. Im also happy to answer questions as good as I can.
Sorry for any mistakes, Im not a native speaker and its 3am in my timezone right now :P