most events in San Francisco are such that the female/male ratio can easily go from relatively high (and therefore favourable) to very low in a relatively short span of time.
The term bronado seems to be a portmanteau of "bro" and "tornado". The term hisicane appears to be a pun on "hurricane". It uses the fact that "hurri" is a homophone of "her" then changes "her" to "his". We could not infer the etymology of bonestorm but we grokked the meaning by the context.