>>Here's a test for you: dry your hands, then take a pair of dry latex gloves, then dunk your hands in a soapy sink for three seconds. Take off the gloves. Your hands will be at least a little damp and soapy. How did that happen, if latex is waterproof? It's because your hand doesn't make a perfect seal with the glove.

No, it's because your hands generate sweat, which cannot evaporate due to being completely sealed in by the latex.

Here's a test for you: fill a latex glove with water and see if it is leaking any. You will see that it is completely waterproof.