When to use 良い夢を

[kokoro16]

I know that おやすみなさい。良い夢を❣️ means "goodnight. sweet dreams!"

I also know that 良い夢を is not something regularly used in Japanese. Right? Is this a normal thing for a man to write to a female friend? Or does it sound more intimate?

How would you respond?

Thanks

[宇崎ちゃん]

It's pretty uncommon indeed, but whether it's intimate or not, dunno.