Psychologist Dan Ariely answers readers’ questions on what makes a first kiss feels so magical:

I suspect that the reason first kisses are special isn’t related to waning marginal utility or rising familiarity—and certainly not because they’re better. (The technique, strategy, approach and objective performance of a smooch probably increases over time.) The key is that a first kiss has tremendous meaning attached to it. It provides a transition to a new kind of relationship and a new way for two people to think about themselves, separately and together. Maybe it is time to try to imbue our other kisses with more meaning?