LET INGA TELL YOU: Both my husband Olof and I will turn 69 this year and for the first time, we’ve started talking about “aging out” — just being too old to do things. It’s not as though this thought hasn’t occurred to us before. For example, we decided some years ago that we’d aged out of hang gliding, which was fine since we’d never aspired to do it anyway. But what about the stuff we might actually still want to do?