On a side note, I don't think Bert could handle both Telly and Ernie in his life.
Imagine Telly visiting them one day while Bert is reading and Ernie is playing with his Rubber Ducky:
Bert: Ernie, will you stop squeaking that duck! I can't read my book about pigeons when you do that!
Telly: Oh no! If Bert can't read his book about pigeons, then he won't learn new things about them, and...and...he won't know how to take care of Bernice! That means...he'll...he'll... have to give her to someone else who does know how! And..and...Bert and Bernice will never see each other again!!! OH NO! THIS IS TERRIBLE!!!!
Bert: Telly, Telly, calm down...nothing like that is going to happen.
Ernie: It's NOT? Great, that means I can't play with Rubber Ducky! (squeak!) (squeak!)
Bert: ERNIE! Will you STOP that!?? I can't read my book!
Telly: OH NO! YOU REALLY CAN'T READ YOUR BOOK AND YOU'LL HAVE TO GET RID OF BERNICE! IT'S AWFUL...IT'S HORRIBLE...!
Bert: No, Telly...I didn't mean...AHHHHHH...I CAN'T STAND IT! I CAN'T STAND IT! AAAAAHHHHHHHHHHHHHHHH...!
Yeah, it's probably just as well Bert doesn't talk to Telly. The poor guy has to draw the line somewhere. LOL