I don't usually comment on post secret. It's a good blog, and it's hard to expand on "it's a good blog," so I just left it alone.
But this is probably the most fantastic idea I have heard all year:
And if you're at the sort of store that sells embarrassing things but not birthday cards, simply ask the clerk as you're checking out, "Is there someplace around here to get a birthday card? Walgreens or something?"