Two women go out one night without their husbands. As they came back, just before 2am, both of them drunk, they felt the urge to pee.
They noticed that the only place to stop was a cemetery. Scared and very drunk, they stopped and decided to go there anyway. The first one did not have anything to wipe herself with, so she took her underwear off, used them and discarded them. The second, not finding anything either, thought "I'm not getting rid of my underwear..." so she used the ribbon of a nearby flower wreath.
The next morning, the two husbands were talking to each other on the phone, and one says to the other: "We have to be on the look-out; it seems that our wives were up to no good last night, my wife came home without her underwear..." The other one said, "You're lucky, mine came home with a card stuck to her butt that read, "We will never forget you."