People will often mistake niceness for interest.
A former co-worker was accused of harassment for saying, "Good Morning" to the receptionist on his way in to his office (she thought he was hitting on her). When he started using another entrance and avoided her completely, she accused him of harassment again for "shunning" her. He quit his job and went somewhere else. The receptionist later said that she thought he was a "nice guy".
(Yeah, I can't figure it out either.)
A former ship-mate was on his first liberty call in a foreign port. He went straight to a bar where he could pay to have a cute woman sit next to him and laugh at all of his jokes. The next day, he went back to the same bar and got in a fight because some other guy was talking with "his" girl -- he actually thought that she was in love with him, and that this other guy was trying to "steal" her from him.
A friend went to a new church. The Sunday School teacher asked if anyone could drive one of the women home. He volunteered. On the way, she mentioned she was hungry. They stopped, got something to eat, and continued on their way. He dropped her off, and that was it. Or so he thought. The following Sunday, he finds out that he and the woman had been "dating" and were currently "going steady". The woman had been spreading these rumors herself.
People are weird.
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.