“For the fairest.”
One of Eros’ epithets is KALLISTOS; the fairest. Anybody with any sense knew that her brother had a hand in that, as well. She’s never been conventionally beautiful, and sure, She’s made it Her mission to upset the status quo, even amongst the Theoi themselves, but He’s never objected to Her presence —She’s his baby sister. They exist to counter and to compliment each-other.
Even when you like something, that’s not a guarantee that you’re going to like everything about it; and human history is ripe with stories of people who loved each-other more than anything, but just couldn’t manage to get along or live together. Or maybe you do, but it comes at an immeasurable price.