From Crosby et al. (2003)

                                 Frequency of various condom-related errors

                                                     Percent of students reporting

Condom unavailable                                    44%

When needed

Stored for > 1 month                                    19%

Opened package with

Sharp implement                                          11%

Applied condom after                                  38%

Sex began

Removed condom before                             14%

Sex was concluded