They want to check the confidence of the boy..
Why does a girl always wants a boy to propose first? Why dont she propose first?
Because girls are shyer than boys.
Because, in most cases, girls still have it ingrained in their mind, from grand parents, or family stories, that.. That's just the way it's suppossed to be. Brought up that way. Another 2 decades or so, that way of thinking will be in the past.