The way you place a stamp on an envelope has a meaning!
The coded messages started in the Victorian era, as a hidden sign of courtship at an age where parents heavily censored mail. If you place a stamp upside down, for example, it means I Love You; diagonally, it means I miss you.
So now you know, if for whatever reason you still use snail mail, be careful how you stamp your letters. Check out more interesting info on this at the source.
Read more at http://www.omg-facts.com/Other/The-Way-You-Place-A-Stamp-On-An-Envelope/55150#ze10EWQXoI72lpDp.99