The words in the message use the more tentative language often used by women: "I think I may need a bathroom break?" Ending a declarative statement with a question mark is also more characteristic of women. I cannot imagine Pres. Bush having written the first note.
You're right, I do that all the time. Now the President will have to cower down to even write something in case of a photographer behind him!!
At least you can't tell by the picture who it is.