Am I THAT Predictable?

Just a quick story before I run off to bed:

I told The Boy's dad tonight: "He (The Boy) needs to go to B-E-D." (Yes, I spelled it because Boy was in earshot.)

Boy responded "I don't want to go to B-E-D."

I suppose I need to rephrase the sentence in the future, and refer to it as "m-a-t-t-r-e-s-s" or some other name.