Graded Age of Consent Laws

Why not propose a scheme along these lines?  The first number is the age of one partner, and the range of numbers is the range of people of a certain age who can legally have sex with a person of first.  It goes for any combination or number of sexes.

14: 11-17
15: 12-18
16: 12-24
17: 12-25
18-21: 14-up
21: 15-up

The thing that really bugs society is the whole ADOLESCENCE/children question around the consent laws.  In theory, we have no immediate moral problem with a 25 year old fucking an 80 year old, since both of them have made the mystical transition into adulthood.  However, we say that a 40 year old and a ten year old is RIGHT OUT.  To quantify the ages so precisely around adolescence seems strange, as well.  To accomodate this, we could have less nasty non-jail sentences (seeing a shrink/community service) for, for example, an 18 year old tapping a 13 year-old), all the way up to whatever age is right-out.  Send a 25 year old who got with an 8 year old to jail.  The process of fixing the age cutoffs could be helped by the psychological establishment.

Although age is just a human concept to mark time and not everyone hits puberty at the same time, anyone under 18 shouldn't be sexing anyway unless they have the ability to handle the results of said sexing. It is assumed someone over 18 has the ability to take care of themselves and offspring and if not they can rot in jail better than someone under 18. If you want to sex someone that has hit puberty, fine, but you should have the legal obligation to the results and not just financially. If you want to sex someone that hasn't hit puberty you should kill yourself.