User blog comment:Astrid Skylar/Who thinks that they should make a third one?/@comment-4122072-20140704132148

I really hope Toothless gets a love interest, which I think should be considered 'a big change for his species'.

Personally, I believe the main reason Night Furies are on the brink of extinction is that they don't fall in love. For them, it's a case of every dragon for himself. They do meet up to breed, but don't stay to nurture their young; once the eggs hatch, they're on their own. Basically, Night Furies have evolved to be selfish, but not Toothless; Hiccup changed his nature, and now I believe it's time for Toothless to pass on what he's learned (particularly to a female).

Mother Nature believed Night Furies could accomplish more by themselves, but she was wrong, and now it's up to Hiccup and Toothless to correct her mistake.