Use of the expression "Stop it! You are too cute" [closed]

In what context would you use "stop it!! you are too cute"? Isn't that negative to say "stop it!! first? Is there a degree or a connotation to it? (i.e, flirty, embarrassed, flattered, etc)

There are two contexts.

• romantic — a girl saying to a guy "Stop it! This is too much" but she's not annoyed.
• "stop it!! This is too cute" about a kid doing something cute.

I don't understand why you need the "stop it".

In either case "Stop it!" conveys the idea that the cuteness (or other emotion inspired) is so overwhelming it is painful --it is hurting the heart of the person who experiences it. It should generally be understood as a comic exaggeration of the situation.

As I understand it, the Japanese actually have a single word kawaii that conveys the entire concept of painful cuteness. In English, however, we need a few more words to express the same experience.