Despite the fact that it always takes quite a while to put this thick penis sheath on, the sheath does not always stay in place long enough. Once on it's quite comfortable and exciting.

To put it on I devised my own method:

1. Grab a short (25cm) piece of ~5mm thick slippery nylon rope
2. Make a loop around your testicles (not around the shaft) and tie a loose knot (not too tight! :-)
3. Lubricate the inside of the sheath
4. Put your testes one by one into the sheath. Actually, the second testicle can be only slid in. The rope will prevent the testes from sliding out.
5. Hide your FLACCID penis in the foreskin and insert the tip of the foreskin as deep into the sheath as possible.
6. Gently press at the base of your penis to squeeze it out of the foreskin and into the sheath while simultaneously pulling the sheath up.
7. Untie the knot and slowly draw the rope out of the sheath.
8. Enjoy

Check eBay for penis sheaths.