I wasn't flaming, I was merely pointing out facts. You look like a premature ferret, basically.
That was flaming.
That's not flaming either if you don't intend for it to be used in a negative manner.
Saying "You look like a twelve year old." can be mean if it's used as an insult, or it can be an honest opinion.
You're obviously going to respond with saying it was an honest opinion, but I doubt that, since you like to say "honest opinions" to everyone which usually are always things that will usually be taken negatively.