Would be better if you said "Did you know you can't spell beautiful without u?" and then I'd be flattered.
Answer: The purpose of flashback is to either move the story forward or reveal information about the character. You can use flashbacks for any number of reasons but its primary purpose is to bridge time, place and action to reveal a past emotional event or physical conflict that affects the character.
Hope this helps!
Answer:
Sorry I don't understand. If you would edit it so it makes sense I will edit my answer and try to answer as best as I can.
Explanation: