Can you give us a link for this Keiko? I must say it sounds fantastical to me, so I would love to read an article about it.

I once saw this show on Discovery Channel
Here's a clip found on YouTube

Cool... I'd like to learn that technique. One of my cousins had retractable testicles, but he wasn't able to control their movement. That was in his pre-teens. I don't know if it still happens or if he can control it. Thanks for reviving the topic, Keiko...

Retractable testicles, ROFL.

http://www.karatedepot.com/pr-gr-09.html

That's what my son and I use. We are both very happy with the comfortable fit and feel of them.

I bought a pair of those same compression shorts with the 'flex cup'. The cup is excellent and very comfortable, but the shorts shrank the second time I washed them.

I'll need to get hold of another pair and hope it doesn't happen again.

Those look to have a nice tight fit. Kind ' like how I usa a tight swimshort for my cup.

Shrinkage:

Neither mine nor my son's have shrunk. I wash them in cold water (without the cup of course; that I wash by hand) and then hang it up to air dry.

Yesterday they started to show tearing near the back tag. I think it's because I am pulling on it too hard. My son is not showing the same tearing. All in all, I don't regret this purchase.

Osu.

I went to an expo in Lousiana in Feb/09 and I found a new groin protection I've been using ever since. Its called the Saw Flex-cup and it comes with compression shorts or jock. I got the compression shorts because its removable. This cup is amazing. Ive taken several hits to the groin since using this cup and let me tell you I was shocked. I wasnt sure at first that this cup would really proform like I saw it. In the demo the fighter was being kicked in the groin and it didnt seem to have a great deal of effect so I really wasnt sure wether the kick was being pulled. I took a chance though. Let me tell you its great. Its flexable, breathable, comfortable no brusing or diging and it protects. I think they will be in the stores soon I know in Feb they were not but they do have an info site online called saw sports. Check into it I think it will do exactly what you want. I know I love mine