One could have templates that specifically mention "this man" and "this woman" or perhaps say "bride" and "groom". I am sure a clever person would be able to write a number of good templates that would be less appealing to same sex partners than to opposite sex partners. But truth be told it all seems like a waste of effort to me. If one cannot in good conscience make a wedding cake for a same sex couple and if it is also discriminatory under the law to refuse to do so if you run a cake shop that makes wedding cakes then the answer is obvious, don't make wedding cakes. Many cake shops do good trade on standard unlabelled cakes.
I rely heavily on Socratic technique. It's a great tool, but certain types of people find it upsetting, and have difficulty distinguishing between being questioned to provoke thought, and being questioned as an attack.
The problem is that anything referring to the gender or orientation of the wedding participants would still be considered discriminatory if something similar was not offered for others as well. After all how hard would it be to replace the word "bride" with a second "groom"? Refusing to do so would still run afoul of the law.
