But when the signs are subtle, it's easy to miss them --sometimes it's even desirable from the point of view of the spouse.

CNN: How do you miss a spouse's 'secret life'?

But understand, again, sometimes we miss it.

WHITEHOUSE: Press Briefing

It's sometimes hard for people to understand that you don't miss what you've never had.

CNN: KISS' Paul Stanley: I'm deaf in one ear