Word of Mouth

Women: share/whisper -- for them to share/whisper to their friends about something, it has to give them a temporary advantage that they want to cure by having their friends get the same advantage as quickly as possible (e.g. did you know there is a secret sale at Jimmy Choo? here's how you get it).

Men: brag -- for them to brag to their friends about something, it has to give them a temporary advantage to articulate (e.g. my new barbecue gets as hot as 1500 C); then their friends have to figure out how to equalize themselves or one-up them a bit further (e.g. mine does 1700 C).