Do you believe in love at first sight?Why?

I have heard about this kind of love from many people.For me it is something unknown which does not appeal to me at all.
I think that this is not love what some people feel on seeing somebody .It is attraction.
This attraction does not lead to love necessarily.Love is the result of attraction while attraction does not lead to love always.
I have never fallen in love at first sight in my life and it is very difficult for me to happen.I can say it may be impossible