There haven't been a lot of studies performed about the love at first sight phenomena, but countless books have been written on the subject, and I oftentimes feel surrounded by couples who feel their unions were decided upon exceptionally early into their relationships. eHarmony commercials tout married folks who openly state they "just knew" when they met that they'd get married, Arielle Ford's The Soulmate Secret pretty much relies on the concept to sell its premise, and one of my siblings recently celebrated her eighth year anniversary with the man she married three months after their first date.
As for me? I'd like to think that love at first sight is possible. There is an innate romanticism attached to the thought of meeting someone and having them hitting enough emotional triggers immediately to just know. Now, Have I ever had it happen? Not the love bit, but I've met three folks over a span of twenty years where I just knew they'd be a huge part of my evolution as a person; I just wasn't sure how initially. One became a great friend, another a very emotionally charged but short lived relationship (although we still stay in touch), and one recent, and still playing out. Not one have told I love them, although admittedly love all three very much. And thus, in my head, no love at first sight for me. A strong hunch, and a driving need to get to know someone better? Definitely.
But what about you? Do you believe in love at first sight? Why or why not?