Love is candy from a stranger, but it's candy you've had before and it probably won't kill you.
A bolt from the blue.
The expression 'Those who can't do, teach' is a curious one, because if you look at the world , you'll see that teachers aren't particularly worse at doing things than anyone else, so perhaps the expression might be better worded as 'nobody can do anything
Accidents happen all the time.
A girl meets a boy, Ed, and everything changes, or so she says.
Fetching objects for people who are too lazy to fetch them for themselves is never a pleasant task, particularly when the people are insulting you.