Quoting MommaSav2:" I think they are smurfs and I think it's a really cute, special thing between your DH and your son. ... [snip!] ... but now daddy is signing these papers to promise that he will love you and take care of you forever". But to each their own."
We had considered it, but we didn't think he was old enough to understand that concept without being really confused. =\ I think he would get it now, but we have decided to wait until he asks more about the adoption, or when we celebrate the 5 year mark... which ever comes first. =]