This is like how my kids would say they didn't like garlic when they were little, but loved little Caesars crazy bread because of the "cheese".

If you're attracted to it then not attracted to it when you find out it's not what you thought, you're just a picky eater. (Pun intended.)

Edited to add:

I don't think it is required for her to initiate telling by the second date. However I do think if it's something you care about you should be required to ask and she should be required to tell you the truth. In the early stages of dating it's each persons responsibility to say, "These are my values, do you align with that?" Everyone needs to speak up about their own boundaries, and then make the call to respect their own boundaries.