Sure. My wife would NEVER let one food touch the other. She was a weirdo.
I don't make a fetish of it. They hit the plate in an appropriate place but if they want to hold hands on their way to my mouth, who am I to trample on their affection?
Not when they're unrelated
I do not maintain a chart of civil law relations for food items, but with the exception of gravy, I like to restrain all items to their appropriate place on my plate.
They will have an opportunity to socialize later.
Oh my God, of course.