These rules dictate where, when, with whom and in what manner we flirt.
The study explains why being funny is closely linked to being fancied.
The Saudi boy, known online as Abu Sin, faces years behind bars after he was arrested for his behaviour in videos exchanged with Christina Crockett on popular live-streaming site You Now.
Riyadh spokesman Colonel Fawaz Al-Mayman said the 19-year-old was arrested for his "unethical behaviour".
Of course, I’d be willing to accept that the problem lies with me – I’m no Angelina Jolie, after all, and I don’t even own a push-up bra.
Indeed, I did assume the fault was my own, until I realised I wasn’t the only one to have experienced such blatant indifference to my feminine charms.