I suspect it to be somehow a configurable feature or you can always remove those manually.
What is there to explain? Why doesn't your wife let you be the person you are?
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.
Apparently, it's wherever Facebook decides it is.
What I do know is I roll my eyes every time a piece of mail shows up from her old IRA account with her previous married name on it. I know I would be uncomfortable with a bunch of pictures of old boyfriends and an ex husband mixed in with pictures of us and our son on Facebook. I realize she has a past and that's part of who she is now, but I am perfectly happy to leave some of those things in the past. I don't need or want daily reminders. I don't think she does either.
Given my own feelings about the issue, I choose to treat her the way I want to be treated.
I don't think you should take a condescending tone toward another man's wife in order to prove your bizarre point of principle.
They give you control to add / remove things from the timeline so it probably won't be an issue, I'm just curious how they handle those topics.
So are pilonidal cysts. But you may not want to broadcast all parts of your life to your entire Facebook friend list.