“不解风情”用英文怎么说。
比如，一个女孩对于一个暗恋自己的男孩。女孩也喜欢这个男孩。于是制造各种机会让男孩接近，让男孩表白，而这个男孩笨到家。不明白女孩子的心思。我们就说这个男孩子不解风情。我们应该怎样用英语形容这个男孩呢？用Ｗooden好似又不太对。

Question

“不解风情”用英文怎么说。
比如，一个女孩对于一个暗恋自己的男孩。女孩也喜欢这个男孩。于是制造各种机会让男孩接近，让男孩表白，而这个男孩笨到家。不明白女孩子的心思。我们就说这个男孩子不解风情。我们应该怎样用英语形容这个男孩呢？用Ｗooden好似又不太对。

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He doesn't understand the local customs and conditions.

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“He/She is such a drip"

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IN English we just say: He doesn't get it!
I think you're referring to a woman giving subtle signals to a man. It is true, most men don't PICK UP ON these things. There is no fixed expression here.
He doesn't pick up on her subtle hints.
He doesn't pick up on her subtle body language.
Similar stuff like that.

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"She's a square" means "她不解风情"

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He does not know women's heart. 
I am not sure if that what you wanted to say, about human to human , especially men and women