Hope this helps:
The Biker's Passive Stretcher (Make this at home!)
There's a bit of folklore surrounding this device! Supposedly, there are a lot of well-hung bikers (think Hell's Angel's).
Well, supposedly, the reason that a lot of them are so well-hung is that they wear a home-made "passive" stretching device. By "passive", I mean that it's very light, and requires no noticeable effort or endurance to employ.
It's a device that can be worn for most of the day with no ill-effects. There is a similar device on the market that costs several hundred dollars...this one will work JUST AS WELL!
Here's how to make your own "Biker's Passive Stretcher":
First, you'll need a good-sized padlock and a thick rubber band. Insert the head of your penis through the lock, or use the rubber band to secure it to your penis. It should NOT be tight, but it should be snug enough to hold without slipping.
The lock should rest just behind the head of your penis.
This device should be worn with fairly loose clothing. Just the regular bounce from walking around combined with the weight of the lock will do wonders for your size!