Q - What would you do if you met another Night Fury, or Red Death?

A - Hiccup: Well, he says if it was a Night fury, it would depend on if it was a boy or girl. If it was a boy, he would be happy he found another of his kind. But if it was a girl, well, he might be able to start a family.

Now, for the Red Death.

It would probably depend on if it was Hostile, or friendly.

Hiccup: Toothless says that if it was hostile, he would... uh uh, no way Bud! If it was hostile, we would take it down together. We are a team! No, don't even think about it. Come on Bud, no sulking. Toothless! Get back here! I can speak Dragonese you know! I HEAR WHAT YOU ARE SAYING!!!

Hehe... Excuse me for a moment.