I think what you talk about here is certain aspects of sexual attraction. Which are, indeed, often lumped together into the concept of "Love". Just like a lot of different stuff is lumped together into the concept of "Intelligence".
The fact that English uses the same word for several concepts (which had different names in, say, ancient Greek) doesn't necessarily mean that we're confused about neuropsychology.
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.