Oh, how interesting! I completely read it as Archie being like, "No way!" and then the very end being more, "Okay, I don't know if I entirely believe that was your only motive, but if that was part of it, good for you."

I'd forgotten about Dora Chapin and Wolfe's complete lack of knowledge about what women might want done to their hair. *g* It is an interesting contrast - and I think particularly in terms of the way it subverts the typical ladies man mythos. A ladies man shouldn't, traditionally, know anything about beauty regimes except whether the end result is hot or not, but Archie's able to identify the colour by brand name on sight!