In the early 1900s, it was customary for the first night of the honeymoon to be spent at the groom’s parent’s house.
After the wedding, the groom’s dad says, “Well, Ma and I are gonna go sleep in the barn tonight so the two of you can have the house to yourselves.”
The next morning the father goes to his son and asks, “Did ya focker?”
The boy replies, “What’s fockin?”
His father takes the boy outside and tells ma to go over to the hay stack and hike up her skirt. Then Pa says, “You see that brown patch on the back of Ma? Watch me get it.” Pa then proceeds to start tearing it up.
Shortly after, the boy’s bride comes down and asks what was going on.
The boy says, “They’s a-fockin.”
The bride asks, “What’s fockin.”
The boy replies, “Well, ya see that brown patch on the back of Pa? Watch me get it.”