Use "killjoy" in a sentence

1. I can’t seem to get through to her that I’m not a killjoy but trying to protect her

2. "Then Pope Julius The Killjoy stole the idea and mixed it all up with the Solstice and Norse

3. As to Christian or unchristian, I repudiate your canting palavering Christianity; and as to the way in which I spend my income, it is not my principle to maintain thieves and cheat offspring of their due inheritance in order to support religion and set myself up as a saintly Killjoy