In contrast to some of my conservative compatriots I do support the right of gays to marry, or more specifically, I affirm the Freedom of: Association, Conscience, Contract and Institutional Autonomy.
The Freedom of Association dictates that an individual has a right to association or not associate with individuals of their choice and the Freedom of Conscience and Contract allows them to define the terms, rights and responsibilities of their relationship and enshrine it in a legally binding agreement. And the Freedom of Institutional Autonomy maximizes the rights of private institutions to run their affairs as they see fit without undue government interference. Even those who believe that homosexuality is a grave sin and offensive should respect the rights of two individuals of the same sex to freely associate, form a marriage contract and also respect the rights of any house of worship to choose to conduct the ceremony.
But, supporters of gay marriage should also be careful about infringing on the rights of others, as was recently the case when a gay couple initiated a law suit against an Illinois bed & breakfast for refusing to host their civil ceremony. Even those who find the choice of the owner "offensive" or "bigoted" should respect his right to (decline to) Freely Associate with the couple, based on his right to (not) Form A Contract with them that violates his Freedom of Conscience and Institutional Autonomy, i.e. his right to run his business as he sees fit. Given the nature of a free market, I am confident that the couple could find another bed and breakfast that would gladly host their ceremony, either out of moral convictions or desire for profit. And in the highly unlikely event that such a bed and breakfast did not exist, the couple and other like minded individuals and organizations would be free to open one of their own and run it as they saw fit.
Let's defend the Freedom of Association in all its forms, even when others exercise it in a manner that we find offensive. Because if we do not defend the rights of "perverts" and "bigots," we undermine freedom and may one day find that it's our choices that are being restricted.