During the boat scene at the start of the game, the man who rows the boat complained to the woman about rowing by himself without help from her. Their conversation later focused on Booker where the man asked the woman why doesn't Booker help with the rowing. The woman replied "He doesn't ROW".
What did she mean by that? Is it anyway (a hidden meaning) related to the story? Or is it some kind of joke that a non-American like me probably wouldn't understand?
Note: I finished the game twice, and so I know the identities of the couple. I compose the question the best way I know to keep the spoilers out.