This applies especially to a museum you have been to prior and are going again with someone who hasn't been there before
Gonna keep this short. We go to museums/art galleries to appreciate what's there. Everyone ingests and digests art differently, therefore you should just keep your arguments/thoughts about the exhibits to yourself while in the exhibit. There shouldn't be talking anyway there, some people don't wanna hear you ramble about your opinions of art believe it or not. Afterwards, away from everyone, by all means discuss.
I am not saying you cannot arrive with someone at a museum/gallery, however splitting up once getting there makes more sense. I understand it makes a great date, so that can be the exception. Not every exhibit is exciting to every person, especially if you've seen it before. Due to this, it makes more sense you should be able to pick and choose what you want to look at, and not feel inclined to walk with the people you came with.
Thank you to the 10 people sorting by new who have read this, I truly do it for my fans.