You're dating him and you're really scary, more scary then him, he's terrified of you. FUN FACT; In the books HTTYD, Hiccup has an arch-enemy, that arch-enemies name is Alvin the Treacherous. And Alvin HATES Hiccup, but he also hates Toothless. Why? Because Toothless shit in Alvin's helmet, that's why. I'm not kidding.