Now that I've got 'um, what do I do with 'um?

I'm talking about birthday cards! I got a lot of cute, funny or schmaltzy birthday cards in the last few weeks. But, I'm always stumped about what to do with them after the event has passed.

Should I save them for posterity?
OK, let's be reasonable--who is going to want them? I mean really!

Will I spend my declining years rereading them and reliving the past?
I sincerely hope that I don't turn into a sentimental old fool with nothing better to do!

Should I save them, just in case?
I am the kind of person who does that. I'm excessively burdened with boxes of stuff I saved "just in case". In fact, I have an email folder with that label. When does a person actually have a reason to use stuff they saved "just in case"? It is probably a fraction of 1%, if that!

Should I throw all of them away?
I can do that! I've done it before..., and I can do it again..., I guess. After all, I can't imagine a situation where someone will ask me it I still have the card they gave me for my 70th birthday.

So, why do I feel so darn guilty about it?