1. A wearable device comprising: a. a device body; b. a body fluid sensor coupled to the device body, the body fluid sensor configured for sensing one or more body fluids used to generate body fluid analysis information, wherein the body fluid sensor comprises a moisture sensor including a sweat collection implementation including: one or more electrodes configured to determine an amount of sweat on a user's skin, and a plurality of zones, wherein each zone of the plurality of zones is configured to receive a specific ion; and c. a processor configured for: i. determining information in common between a plurality of contacts of a social networking system; ii. analyzing additional information including a current location of at least one contact of the plurality of contacts of the social networking system, the body fluid analysis information for the at least one contact of the plurality of contacts of the social networking system, and meal information of the at least one contact of the plurality of contacts of the social networking system; and iii. providing an event recommendation by computing recommendation scores based on the information in common and the additional information, wherein a location of the event recommendation is affected by the body fluid analysis information due to menu options available at the location.