http://www.citylickers.com/shop/images/luna-balls.jpg I bought this a few weeks ago to practice kegel exercise. Not because i have any problem, i just wanted to strengthen the muscles down there and want to be able to "milk a penis" like said in this thread: http://www.lpsg.org/173656-milking-the-penis-with-the.html however, these balls are too big they hurt me to put it in, but as long as it get in, it doesnt feel like anything even i use the heaviest balls. feel like tampon. when i walk around i can feel the balls moving inside. besides that i dont feel a thing, even the heaviest set i kind of feel that i waste these money, or maybe i could save them after i have children xD but.. seriously, anyone use these kind of ben wa balls before?! what are you suppose to do with them? you move them inside ? or push them side by side? i have no idea how to do that! i coulnt find any video or porn about anything how to do the exercise properly, i really have never seen a squeezing vagina except for my own... which is reasonable coz i guess some girls dont want to share this wired movement of vagina to public. but im really curious now how to do that? help me please!