Yes Sir!

Shawn taught Cash to say "yes sir". It is really cute to hear him say it in his Cash voice way that he says things. Only problem is he says "yes sir" in response to me. I cannot get him to say "yes mam" instead to me. But part of me doesn't want him to say "yes mam", because I don't want to be a "mam". I may be ok with him saying "yes sir" to me.