Do the following:
First say something along the lines of: “that is very difficult, one the one hand you are so astonishingly beautiful that all features of you could be made by a master craftsmanship, on the other hand, as I am a person of faith, you could also be just God’s most perfect creation.
Either way, would you excuse me a second while I go to refresh in the bathroom?”

Then you sneak out of the bathroom window because by the glorious lord Satan himself, you do not want to be in a relationship with someone who insists you do something after you refuse