Update: Apple appears to have now pulled the image from its Siri results.
A rogue update to the Wikipedia results for Donald Trump has meant when users ask “Hey Siri, Who is Donald Trump?” a picture of a penis is shown as part of the Siri response, definitely something Apple will be working on fixing as you read this.
As of the time we published this article, asking Siri ‘Hey Siri, Who is Donald Trump?’ and ‘How old is Donald Trump?’ brings up the explicit image. One of the main sources for information provided by Siri is Wikipedia, which in effect can be updated by anybody.
Judging by social media responses the image isn’t showing in all regions. We’ll update this article once the image has been removed.