These two women went out for a night on the town and got just totally sloshed.
At the end of the evening they decided to take a short cut through a cow pasture after being unable to find a ride home. They became lost so split up to try and find the road home.
One of the lushes doubled back only to stumble on the other flat on her back sucking on, and playing with a cow's udders. Her friend screamed "what are you doing"? the other lush says "shut up, with all these guys here someone'll drive us home".