How come celebrities can't go on screen together ?Not award shows just like interview or any other kinds of shows ?

its not that they cant go on shows together. they CHOOSE not to go on shows together

That is not cool. I think they would promote better and get more fame like that.

the main point that celebs avoid discussing relationships in the first place is because it would give them a bad image with majority of rumours being negative...others dont like talking about relationships because they want to be known for their work/music...not their weekly rumoured partner...they want to avoid more rumours that's mainly why they dont appear together...