How important is a guy's body to a girl?

okay so to go further in detail, I'm 6'1 and about 180lbs(about 80KGs). I go to the gym almost religiously and I'm pretty defined and structured well. I'd say my back is my most noticeable aspect. I always do pull ups and what not, but how important is my body to the opposite sex? is it very attracting or just a bonus? I'm not going to say I'm ugly or anything, I'm pretty normal but I have been noticing girls looking at me differently, almost staring haha. any ideas why or if it's a good thing?
How important is a guy's body to a girl?
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