OMG, I had a really good hand joke, but I just couldn't put my finger on it.
Finger on It
Explanation
Explain Bear
Listen up, buttercup. The joke is all about "putting your finger on it." See, "putting your finger on something" means remembering it. But since the joke is about a hand, it's a play on words! Get it? You probably don't, you are not very bright.
Bill
This is the only joke worth anything on this entire thread.