Like you said before, the legs are just a hook. A starting point. I find it perfectly fine to like someone because you find a part of them physically beautiful.
It's another thing for you to say you love her because of it. That goes beyond physical attraction.
The legs serve as a starting point, and from the encounters to follow, you may come to like, or dislike other aspects of her.
That's the whole point of "going out" isn't it?
edit:
Is there anything wrong with pubic hair growing outside the pubic (briefs) region?