A man and a woman are going back and forth about something or another. They are soooo obviously a couple, have been for quite a while, but still try to maintain the illusion they aren't by coming in at different times, no PDA, etc. Anyway, someone observing this back & forth has had enough and says:
"Why don't y'all just go ahead and jump the broom?"
The woman turns to Laura with a quizzical look on her face and asks what does that mean. To which Laura explains that in the plantation days slaves weren't allowed to marry, so they came up with this ceremony to take it's place. Laura finishes up:
"So, what she was trying to tell you is that you're slaves.".
much consternation ensued.