I’ve had a bad right knee since 2013. Had mri, exploratory surgery, but no answers to what’s wrong. Strength training legs has helped somewhat, but I still on occasion experience pain. Anyways this evening conversation with my husband Me: *gets up* ouch. Bloody knee Husband: you ok? Me: yeah. Knee has been hurting a few days. I’m gonna need a knee replacement by the time I’m 60 Husband: That’s optimistic. I was thinking more like your 50’s Me: that’s not really that far away Husband: I’m aware.