there is such a technique.. tho I have not personally been with anyone who has mastered it yet... I get the impression from dadaist's post above that he may have some knowledge of the technique... dadaist.... am I right????

here is a link that a great friend shared with me... if you read it all... especially the section towards the bottom " Strengthening exercises of the muscles in the pelvis" it might give a hint as to what shooter may have practiced

http://www.aeonglobe.com/magick/sex/preparations.php