My informant learned this saying from an old television show that he used to watch.  This saying has become part of his daily speech.  Almost every conversation he has includes his saying “boys will be boys” to the point that the person he is talking to is extremely puzzled.  He says it in situations in which they saying makes no logical sense, hence the confusion of the person he’s talking to.
My informant likes this saying for the irony and confusion.  He knows that it doesn’t make sense when he says it because he says it at the most random times.  When he says it, it somehow relates back to the conversation, but not necessarily.  It leaves people speechless because they don’t know how to respond.
For my informant, “boys will be boys” provides him with a sense of nostalgia because it reminds him of watching television as a child.  Because he learned the saying from watching a television show, the saying reminds him of childhood and the fun times he had as a child.
My interpretation of “boys will be boys” is quite different from his.  In his case, he says it for the sake of saying it.  I believe this saying represents how boys act, and many people interpret it this way as well.  This saying is a way of asserting that boys are stupid and immature.  Boys can act like complete idiots.  This saying is just a more polite way of explaining how boys can be.  I think that this saying is very useful in life when talking about boys.  It isn’t as harsh as saying how boys act.  By saying “boys will be boys,” people know what someone means without saying something in a blunt manner.