One attraction of living in Mexico City is its constant capacity to surprise me.
El Distrito Federal has just registered the first birth certificate for an adult who has changed sexual identity.
In August of 2008, the city government passed legislation making it legal for transsexuals to request a new birth certificate showing their new sex.
This, along with recent laws liberalizing abortion and providing legal rights for non-married and gay couples, puts Mexico in the vanguard of world opinion about personal freedoms of expression, belief and sexual orientation.
Next time you find yourself in a conversation about how backward and third-world Mexico is, think of this.