[Tori58]

Well, technically, it's impossible to know how much "chemistry" you might have if you haven't met someone face-to-face because the chemistry of attraction depends, in part, on pheromones. People think they're attracted to another person because of how they look but, more often, it's because of how they smell.

But chemistry is not historically a particularly important factor in marriage which is essentially an economic and social contract. Today, of course, we expect it all: chemistry plus similar values and life goals. I think there is a lot of value in getting to know someone before your brain can be co-opted by "chemistry" though, especially if marriage is your ultimate goal, as I think it is for people on eharmony.