For many centuries many have wondered that same question for years upon years - On , on ,on thrught , through.
Not very many have come up with the actual answer to it but I can tell you that when we do fall in love with someone its not instink or nothing near that its an emotional connection that is not noticed or anniliyzed to where it is activated in the human brain at all infact its known that the brain is still unknown of how it works , the things that activates the sences that we all get internaly , other wise.
It is said that its the its easy as looking at who ever is well dressed in any thing , groomed etc. but that is not true it is if you can tell how the person is from with in , they have to be able to do the same when it pretaines to you that is one way but not everyone gose by that all they go by is how hot the girl looks in a tight skirt , blouse or tanktop with a g string etc , how good the guy looks , notice its always on the apperance of the person on the outside that is not what tells you or anyone about that one person. its all about who they are from with in , It is importaint to look nice but its all about the person of who they are from with in as it is the same with you as well.