We weren't dating yet but there was a time a guy and I were considering dating (we had known each other for awhile) and hit a dealbreaker--not mine but his. He asked if I was ready to get married.
He didn't mean to him, just in general, but I still found that to be an odd question to ask someone before even a first date. I jokingly said, "Not unless it's to Jesus--why do you ask?" He was all aghast and said, "You would marry Jesus? How would you do that?" I told him I was just joking and he told me not to joke about Jesus, it's blasphemy. He was really upset and told me I didn't take my religion seriously enough. He cancelled our first date and we didn't speak much after that.