The couple, who have been together for 17 years, became parents when their son Zachary was born via a surrogate on Christmas Day.
Speaking about the prejudices they face, John said to Sky News: 'To be honest we expected it. There's only, really, one publication that's been like that and we knew that was going to happen.
'It's sad in this day and age that they're like that but we expected it because it's par for the course.'
He added: 'They don't seem to like David and me very much anyway - we knew this wasn't going to be everyone's cup of tea.'