I am not an advocate of changing the contract laws or the age of majority to allow adults to have sex with children.
If you're engaging in a behavior with some one else, it would not make them very happy if you forced them to do something so you could be happy. We assume children are vulnerable to adult manipulation and force and we protect them.
Regarding the other things, you tell me why they should be outlawed. In a free country you should justify your position not those who advocate freedom. Government power and restriction should be justified. Odd, that I would have to explain that on a conservative site.
Individuals who work in the marriage business such as wedding photographers, cake decorators, those who rent out halls, etc. will all be required to work for gay clients or else face financially ruinous lawsuits.
Most gays will prefer to go to gay-friendly wedding businesses, but there will be a few extremists with chips on their shoulders that will hunt out Christian wedding businesses in order to initiate lawsuits.
The freedom of a few gays to wed, will result in the prevention of 1000's of traditional religious folks from continuing to make a livelihood in the wedding business.
So can we put you on record as supporting plural marriage and marriage to farm animals (bestiality) since some would find restriction of these “marriages” to be a restriction on liberty and the pursuit of happiness?
Ah then, you allow that the "pursuit of happiness" can rationally have boundaries and/or constraints?
The question then becomes, who should decide?
The perverts? or the vastly overwhelming normal majority?
That's what Prop 8 is intended to answer. We all (at least the adults) already know that boundaries and constraints are essential for a normal society to remain healthy.