Seeing a bit of ankle when the object of your desire lifts up their long denim skirt an inch or two.
A bare elbow when you're at a I Kissed Dating Goodbye conference and your crush lifts their hands to praise God during the worship service and their sleeve falls down a bit.
Seeing their face smile not grimace at all when you tell them that after many hours of prayer God has told you that He wants you both to be married to each other even though you have only spoken like five sentences to each other.
Just like, having sex. When you're married, of course. And a minister or pastor has blessed your union. And you've just graduated Bible college. And you've prayed beforehand. And after. And during, just to be sure what you're doing is okay.