Earlier quoted context omitted.
I see your point and it's a good one but humor me. What is there to explain? Why doesn't your wife let you be the person you are?
Where's the line? Rating how good your past girlfriends were in bed? Describing how you had the best valentines day with a previous girlfriend, and not with your current wife? People like to believe they're special. Talking too much about ex-gf/bf's is a recipe for disaster. They can't handle the truth! Do you tell your wife her ass looks big as well? ;)
Wherever you and your wife (partner) deem it to be.