No one is suggesting it YET! Once we've codified law based on someone's sex life, we are bound by the equal protection clause of the Constitution, whether you like it or not. How can you give a 'right' to one group of sexual deviants, and not give the same 'right' to another?
Another one of your ridiculous spin jobs where you turn reality on it's head. The sexual deviants you claim to be worried about unleashing (i.e., pedophiles) did have the right to marry children not long ago. It did not lead to people marrying their dog, mil box or even someone of the same sex.
The fact is, that you wish to codfiy sexuality into the law by denying homosexuals the right to marry. No other sexual "deviant" is disallowed from marriage on the basis of sexual deviancy or to discourage sexual deviancy.
Equal rights for homosexuals does not logically lead to eliminating protections for children or allowing people to marry some one or thing that cannot or will not consent. It's a non sequitur and a worthless argument.