I've never understood it either.
I haven't lacked for celebrity contact. I have Micheal Boatman on Twitter, I have author friends, I've met Sandra Bullock, Keifer Sutherland, (filming the Time To Kill movie) John Cusack, and most recently Dan Akroyd (who's looking for a house down here for some reason) and was mucking up my favorite liquor store with lines and starry eyed slow people who have no taste in whiskey. Never once have I had the urge to ask for an autograph. I just don't get it. I mean, I speak, I tell them how much I enjoyed their movie or book and I say thank you but I've just never understood what signing their name on a sheet of paper is supposed to do for me.