Our romantic partners may be riddled with flaws but do our own biases mean we overlook these, even if there are better options on offer elsewhere? As a child of the 1990s, my mind turned to Chandler Bing several times while writing this article. His inability to be annoyed by Janice’s laugh in Friends is, I think, a very good analogy for the idea that we can be blinded by love. An unlikely romantic couple seeming to hit things off when all around them can see how bad a match they are is perhaps the most common trope in romantic comedies. But when people we know are unable to detect…