I had told Shu that what I had for dinner really hit the spot. He wondered where that term came from. I looked on several web pages and this one seems to have the best explanation to me.
Any other thoughts?
Yes, but children might read it.
Yes, that was in many of the dictionaries I read, too.
The first citation in the OED Online is from 1836:
N.-Y. Evangelist 27 Feb. 34/2 Even if we pass this resolution, it will not heal the wound. It does not touch the spot.
The way I remember that Pepsi-Cola jingle is
Pepsi-Cola hits the spot,
Ten minutes later it hits the pot