Insight into being an Evangelical at a Catholic Wedding

Me to the girl beside me: "Am I allowed to take communion here, or no?"
Her: "Not if you aren't Catholic, no."
Me: "Ah, I'm never sure what to do since I'd normally take communion...."
Her: "You can go ask for a blessing. If you cross your arms like this."
Me: "I can do that if I'm not Catholic?"
Her: "God will still bless you! .....I think."
Me: "Ha! ...Oh." *Slinks down in Pew*