My best man at my wedding is gay. My wife and I both know and enjoy the company of several gay and lesbian couples. However..

Wedding cakes bakers and photographers are, at their sheer essence, artists to at least a certain degree. They are trying to capture the spirit of the couple on their 'big day'. I would fully expect an artist to have the ability to say "Sorry fellas, I am unable to do a cake that is YOU" without it being discriminatory. And if you don't think photogs and cake makers aren't artists, see some of of the really cool creations some of these men and women have.

Last thought. My wife and I both ride motorcycles. My wedding ring looks like a motorcycle tire in fact and I bought her a new motorpickle for her 1-year anniversary present. Heading into our wedding day, we found a cake maker who was willing to use our own molds that we provided to create a chocolate motorcycle wrap around the cake. If they had said "We can't do cakes with motorcycles on them because we are against them" we would have moved on to another place that was happy for our business and willing to do what we wanted for our wedding day. It wouldn't have been a matter for the courts. I understand motorcyclists aren't a protected class, but hopefully you get the gist.

Oh, and for the record, we still have some of the motorcycle cake decorations saved in our freezer 5-1/2 years later.