AKe:

I am seriously missing something here. In what way is anything "imposed" on you if Rick and Robert want to swear life-long togetherness and make a civil condition out of it?

Are you required to attend? Watch the festivities? IS your mind so out of control that the thought makes you imagine things you find disgusting against your will? How does it add the slightest jot to your burden to grant tolerance to individual choices in private matters?
And if you think sexual preference is not a private matter, why are you prying into it when it should be a private matter?

A