You can read about it here.
Meanwhile, I've been thinking about the valentines from my own elementary school childhood--how I used to scour them for hidden meanings from the boys I liked, not realizing then, of course, that boys weren't into "hidden meanings." Or at least those kinds of hidden meanings. "Verbal" is what I'm talking about here.
No. If the boys in the fifth grade liked you, they just threw chestnuts at your legs when you standing together at the bus stop.
And the confusion just goes on and on . . .