A naked selfie of Joe Biden's brother Frank has been discovered on a gay porn site.

The photo was uploaded to GuysWithiPhones.com in 2018, when Frank – who has a long-term female partner Mindy Ward – was 64. Even after more than five years, it is still live on the site.

It was first unearthed by right wing nonprofit Marco Polo, which has been investigating the Biden family for alleged political corruption and crimes for years. 

When approached by DailyMail.com, Frank, 69, conceded he was the man in the photo but denied he was the one who posted it.

'I've absolutely no comment. I could care less. I haven't even looked at it,' Frank said Monday morning when asked about the shot at his Florida home. 

'They must have hacked my phone,' he added. 

'Anything that is a revealing picture of some kind is between Mindy and me.

'I really don't want to start my day off this way,' said Frank. 'Definitely didn't post it anywhere.