This trait game, along with Royzman’s review of the literature on attraction, hints at some of the endless quirks of the online dating marketplace.

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So perhaps you should make that Tinder tagline all about how you volunteer at an animal shelter every weekend.

Swiping through endless Tinder photos in search of the most alluring possible one might not be fruitful, either.

For women, however, "It's a more complex choice,” he said.

“What tends to matter for females is that the overall package is good," meaning that women might accept a less-attractive mate if he was outstanding in some other way.

I think for a second, and then I write equal amounts (70) next to both hotness and kindness, then 40 next to income and 20 next to fidelity.“Oh wow,” he says.“What? Usually women allocate more to fidelity and less to physical attractiveness.

Maybe you think fidelity is something people can cultivate over time?

Men and women make mating decisions very differently, he speculates.

Men tend to act like single-issue voters: If a prospect is not attractive enough, he or she usually doesn’t qualify for a first date, period.

Charles Darwin first began to develop his theory of natural selection while journeying on the as a “gentleman companion” to its captain, Robert Fitzroy, but only after nearly being turned down from the job because Fitzroy thought “no man with such a nose could have the energy" required for an arduous voyage.

There has been some evidence that strangers can accurately predict qualities like extraversion, emotional stability, and self-esteem based on photos.

Most people end up with someone who’s about as good-looking as they are.“People might prefer attractive people, but they often end up pairing off with people who are similar in attractiveness,” Leslie Zebrowitz, a psychology professor at Brandeis University and an expert on face perception, said.