being just flirty enough to make someone comfortable, and then whipping out a little creep to keep them on their toes. if they're a perv too, it'll work out. if not, it was never meant to be.
Perving (or the appearance of perving) often occurs unintentionally when one tells his spouse / girlfriend / significant other, "I'll wait in the car."
Note: Also known as "Doing the Perve."