Not sure whether you were specifically referencing it, but this was made for an episode of Silicon Valley, and is also a real, functional app.

On the show, it was originally created for detecting hot dogs, but found a second (and far more lucrative) life as a penis detector.

https://www.engadget.com/2017-05-15-not-hotdog-app-hbo-silic...

More technical discussion here: https://medium.com/@timanglade/how-hbos-silicon-valley-built...

I don't even know if external links to Twitter work any longer, but Elon claims that Twitter has a "dick pic bot": (maybe joking?)

https://twitter.com/elonmusk/status/1678143935976464384?s=20

He would be pretty aware since he’s always engaged in a dick measuring contest.

> Are there any YC startups specializing in detecting penises?

I’m sure Reddit had developed, tested, and perfected this technology.

I mean what the hell else have they been working on for the past 18 years?

Ragecomics

Breakthroughs in PR?

When I worked in games in the late 2000s the rumour* about why Minecraft was able to come in and do what everyone knew that Lego should have been doing (a multi-player online block-building game), was that they spent so long trying to create a Lego penis detector that they missed their opportunity.

* - I cannot verify this, so take it with a pinch of small white cubes

Turns out a simple Google search would have confirmed it rolleyes

https://mcvuk.com/business-news/publishing/former-lego-dev-p....

> “It was all automated, but the human moderators were, if I remember correctly, the single biggest cost center for Lego Universe’s operational costs,” said Fox.

I know that Discord has a poor implementation of this technology. I once spent 10 minutes trying to upload a photograph before I realized that a pig’s snout was tripping its indecency detector. I had to put a black bar across the offending area to bypass it. It must be a feature channel operators can turn on?