There's also. I want to participate but I am not entirely sure of the social rules—as ng_moomoth describes, the rules are different here—and the rules I have internalized say red light. (Some of those rules are bullshit. But I don't know which ones.)

That would apply even more strongly with physical contact than with virtual contact. Like I don't know that I'd offer to hug, for instance, alatefeline in meatspace. I don't know as I could. Red light. But we virtually hug all the time.