MyBlackBook provides its members with a place to store their sexual history, partners, and experiences in a safe, secure and confidential place. MyBlackBook allows members to manage, update and lookup their entries in an easy way - giving them the opportunity and ability to assess their sexual behavior and activity and, if desired, to make changes in their life. One of the features that MyBlackBook offers to its members is the novel VDNote which has the ability to calculate the probability of obtaining several sexually-transmitted diseases, based on the prior sexual history of the user. The patent pending technology helps simplify the task of modifying sexual habits by actually computing the risks involved with having unprotected intercourse and other related attributes. MyBlackBook also offers its members the ability to view statistics of their personal history in the form of real-time activity graphs, intimate partner reports and more. All of the features offered to its members are currently free to use and enable members to put all of their "black book" contents into perspective, giving them an at-a-glance view of whom they've slept with.