How can men tell after talking on the phone or via text IN ONE DAY or a few hours, that I’m not street smart and would fall for “I want to marry you”?

This happened multiple times. And no it wasn’t them joking. They would keep taking marriage plans even after saying it the first day. One of the guys who did this , I was very into. So I get how he probably saw that I was gushing over him and said ok she’s an easy mark.

but this also happened with a guy I was not attracted to and not thinking of in more than a basic friendly way. He came after me online and then once he saw my pic, he basically said all this stuff about how I’m his wife and he already knows blah blah. I wasn’t giving off signals or words that I liked him. I was being polite. He wasn’t attractive to me even.

how do men know I was such a not street smart woman?

Updates
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Just remembered I told the second guy that another guy forced me to do sexual thing. So that’s why he probably saw I’m easy prey because I told him about how I was forced to do sexual thing. Damn I FORGOT ABOUT THAT. NEXT TIME I can't TELL GUYS I WAS RAKEN ADVANTAGE OF.
How can men tell after talking on the phone or via text IN ONE DAY or a few hours, that I’m not street smart and would fall for “I want to marry you”?
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