Women can tell when you cheat

[plwk]

...but men seem to lack the same ability when checking out women... More here

[tomamundsen]

Wow, this is talking about women judging strangers by their faces. Intriguing.

This was funny:

Faithfulness is seen as important in the context of sexual relationships and mate choice, the scientists wrote in the paper.

[Astus]

Based on the article there are a few problems with the research.

“More masculine-looking men (were) rated as more probable to be unfaithful and having a sexual history of being more unfaithful.”
"Men, on the other hand, seemed to have no clue. They tended to perceive attractive, feminine women to be unfaithful, when there was no evidence that they were, the scientists noted."

So, if someone matches the stereotypical idea of man/woman it's more likely to be also unfaithful according to both sexes. And while men confessed their unfaithfulness to a greater extent, women did not, the reason being the social view of adultery that this article strengthens and follows.

[Jikan]

Totally speculative, but I have known some women (heterosexual) who claim they can identify (heterosexual) men in a crowd who are either single and unhappy or are in difficult relationships and therefore may be sexually available, without using words or gestures. Just by "smell" if you will. I don't know if there is a way to quantify this kind of phenomenon. Perhaps some people are more empathic than others and can pick up on the emotional state of persons around, particularly if they have an interest in thsoe states (helpful in seeking a partner for sex). Or it's pheromones. Or...

[Astus]

I don't believe that one's mental abilities depend on one's physical sex, and have not yet found any opposing reason or evidence to it. Otherwise we are stating that one sex is better in certain things than the other simply by birth.