Nice! I saw this in a StackOverflow post, it's odd that it would work that way don't you think? (probably not) but I think say you are A, and you connected to B

Nice! I saw this in a StackOverflow post, it's odd that it would work that way don't you think? (probably not) but I think say you are A, and you connected to B (Facebook) and you then connect to C (YouTube), why would you not see A instead of seeing B at C? Anyway thanks