Do Pheromone colognes work?If so which ones work?

Ive read a little about pheromone colognes.Seem too good to be true.Ive come to two that have me somewhat convinced that they do work.I need one to attract a conversation,and one to for ual attraction.If you have some experience with any,which two do work?Id like real answers from real people and please keep all negative comments aside.