[50mm]

Food for thought. I found this at Prolife.com:

In 1993 the University of Texas analyzed the results of 11 different studies that had tracked the effectiveness of condoms to prevent transmission of the AIDS virus. The average condom failure rate in the 11 studies for preventing transmission of the AIDS virus was 31%.

One reason condoms fail in preventing the transfer of AIDS is that latex condoms have tiny intrinsic holes called "voids." Sperm is larger than the holes, but the AIDS virus is 50 times smaller than these tiny holes which makes it easy for the virus to pass through [Source: Dr. C. M. Roland, editor of Rubber Chemistry and Technology]. To give you an idea of how easy it would be for the virus to pass through these holes, just imagine a ping pong ball going through a basketball hoop.

[wolf78]

One reason condoms fail in preventing the transfer of AIDS is that latex condoms have tiny intrinsic holes called "voids." Sperm is larger than the holes, but the AIDS virus is 50 times smaller than these tiny holes which makes it easy for the virus to pass through [Source: Dr. C. M. Roland, editor of Rubber Chemistry and Technology]. To give you an idea of how easy it would be for the virus to pass through these holes, just imagine a ping pong ball going through a basketball hoop.

That's an urban myth. Often told, but scientifically wrong. Latex condoms indeed provide an effective barrier against HIV, if used correctly. There are no micro-holes. That claim is just BS. The sometimes high failure rate is rather caused by incorrect usage (e.g. trapped air within the condom etc.).