Relationship dynamics between two people are never going to be completely equal. One person is likely more emotional, or less tech savvy, or more physically affectionate than the other. Which means that while one of you may book smart, one of you is probably more street smart than the other.
I experienced a lot of this while dating He-Who-Shall-Not-Be-Named (starts with a B, ends with a RAD). Oddly ridiculous displays of pure, unadulterated idiocy were a daily occurrence with you-know-who and sometimes, the magic of smart phone cameras were able to capture the moments in which I thoroughly regretted all of my life decisions that led me to him.
These peeps are able to pinpoint the moment where the clouds cleared and they were able to see their significant other for who they are, or, well, who they aren't.