I see them all too often and I always want to know. Mostly, becauseyou are funny and clever (hello, Mr. Mott, et al!), I want to hearyour responses as to why they are doing this.
Aside: I used to see guys masturbating all the time, like a couple oftimes a week, in all different parts of the world, on beaches and parkbenches and in cars, usually in the mornings, but that hasn't happenedto me in a while. Sorry for the un-family-friendly aside. It wasrelated in my mind.
Now go with your mailbox-sitter-guy theories!