The 'blow hot blow cold' story often refers to someone who is inconsistent in their attitude or behavior. For example, a person might be very enthusiastic about a project one day and then completely cold towards it the next. It's like the fable where a man blows on his hands to warm them and then blows on his soup to cool it, showing his changeable nature.
I'm not sure. It depends on the specific context of what 'Blow' refers to. If it's a movie or a book, you'd need to look into its background and the author's or filmmaker's statements.
It's hard to say for sure. 'Blow' could be a complete work of fiction or have some roots in reality that have been significantly transformed in the storytelling process.
I recommend a healing novel to you, and that is Mu Yan. It is a fantasy romance novel about ancient mythology. A heart-wrenching love, with laughter and tears, no regrets even if they loved to the point of breaking into pieces! This book gave people a feeling of sadness and happiness, and their mood would be healed. I hope you like my recommendation.