Colon Anatomy and Deep Fisting

With permission from martijn2008 I may post this text.
It's about how you must hold your hand for extremely deep fisting.

I've had an mri scan last week , and one of the pictures showed the pelvic configuration quite nicely.
You can see how the vertebrae start at a forward slant as the spine goes up from the pelvis.
You will also notice how the bladder is right in the middle of the path between the bellybutton and the spine.
Keep in mind that the first 7 vertebrae are locked together , fused with the pelvis.
If you choose the pathway starting at the rectum going up, you will slide past the prostate (coloured blue), pushing against the bladder (coloured yellow), ending up at the diaphragm(coloured green), or the liver/stomach/k**neys if they are in the way.
The things to bear in mind are: make sure to properly brush against the prostate (that feels great); be carefull when you push against the bladder (you're bound to have an effect if the bladder is full); and try to make the bend/turn once you go past the bellybutton ( or you'll block the breathing by pushing on the diaphragm)!
If you don't follow the front half of the abdomen the spine will be in the way, as you can plainly see...
I hope this illustration is clear enough.

See for the pics on my site : http://xhamster.com/photos/gallery/613719/colon_anatomy.html