Our memories are therefore associative. The events that constitute them link to one another in an associative network. It’s as though you have a giant index in the back of your head that lets you look up any possible thought or experience and then points to where to find it. Some memories are easier to retrieve because the cue we use—the index entry—is so unique that there’s only one memory with which it could be associated; think, for example, of your first kiss.