In September 2018,
Mark Saltzman, one of the script and songwriters for
Sesame Street, revealed in an interview with
Queerty that Bert and Ernie were analogs for his own intimate relationship with film editor
Arnold Glassman, with whom he had been together for over 20 years.
[7][8] Despite the fact that he began working for Sesame Street fifteen years after Bert's first appearance,
Sesame Workshop responded by claiming that Bert and Ernie don't have a sexual orientation because they are puppets.
https://en.wikipedia.org/wiki/Bert_and_Ernie