If the procedure was timed properly, the astronaut could open the valve while urinating and expel the waste into space. If it was not timed properly, he risked exposing his tender parts to vacuum forces. To prevent that, Anders opened the valve too slowly on his first attempt, blowing off the personal end of his condom and sending twinkling golden droplets dancing weightless through the cabin. His timing improved after that, he made sure of it.
