Although laws seem to only consider age, this makes little sense given the wide variety in puberty.  Some 19-year-olds look 15, and some 13-year-olds not only look 17 but they have probably matured over their peers to the point of being <i>physically</i> closer to the average 17-year-old than the average 13-year-old.  It is certainly possible for a 17-year-old and 13-year-old to seem physically similar and be attracted normally to one another.  Society shouldn&#x27;t be able to auto-condemn a relationship at one point in time, and magically become OK with it 5 years later (when the two people may not even look that different).<p>It gets even worse when absolute age is considered.  It&#x27;s insane that two 17-year-olds can meet and date and want to have sex, yet people come with pitchforks to prosecute the first one unfortunate enough to turn 18!?