By your reasoning, they should have just grabbed their ankles and given in to the leftists and their gay agenda.
How many times, when signing a legal document, have you demanded the legal documents not refer to the parties as parties? What!!!!!????? Never? Shocking.
The pastor did not have to, nor did he, refer to them as Party A and Party B. So they were not ever going to be known as Party A / Party B.
That you think of anal sex in this context is more than a bit disturbing.