I always opt out, so I've never paid attention if there is a male / female button that a TSA employee needs to push. Is this something to do with the Automatic Threat Detection upgrade? If so, this is again setting up the TSA for more failure.

The only issue I recall with what one's gender is at the checkpoint is during an opt-out. TSA employees in this forum have stated that passengers will be groped based on the gender they present themselves as. Okay, fine.

But Tristan in not opting out. She's going through the Nude-O-Scope to (presumably) not have to answer questions about her gender so an assist can be called for a grope. Breast tissue can vary widely regardless of gender, so that shouldn't be an issue.

So it boils down to the fact that since there is a lack of something, namely a penis and testicles, this is something that needs to be resolved to complete the screening process. So just how exactly does the lack of a penis and testicles pose a threat to commercial aviation?