The meaning of this stalk
This is actually a very ridiculous sentence. Because seafood always smells like fish, it gets dirty without washing. So what it usually means is that girls don't like to be clean and dirty, and they smell heavy. Or girls don't love themselves, promiscuous, and private parts have a taste.
The source of this rhizome
Under my unremitting search, I found that this stalk came from a sentence said by a man in a variety show. The original words are: "I introduced you to fresh graduates, not the seafood market."
The usage scene of this stalk
Personally, I think that using this stalk is actually mean to girls, and it is men who tease girls in a discriminatory tone. This is based on the wrong values that insult and belittle women. Therefore, it is not recommended to use it in daily life, otherwise it will appear that your quality is relatively low and you don't know how to respect others.