Why? Because one of the writers for Sesame Street has outed Bert and Ernie according to an article in the UK Sun.
Though Bert and Ernie have been a fixture on Sesame Street since 1969 and gay writer, Mark Saltzman joined the organization in 1984, he has modeled them after his relationship with his partner, Arnold Glassman.
Saltzman actually co-opted the beloved characters to fit his own personal relationship though it was 15 years after they were introduced. He told Queerty that he was Ernie and Glassman was Bert.