Life on berk was never normal. dragons were always there before they were pests and everyone wanted to kill them, now they are man's best friend working in sync with the hooligan tribe. Nowadays they are part of everyday life people get along with them and they get along with people and these blonds can be really strong between trainer and dragon. most are inseparable and this was defiantly shown between a girl of 2 dragons when there bond and trust would be tested to the limit.