Bush and Obama are standing together at the urinals...

Bush and Obama are standing together at the urinals draining the ole lizards, when a curious Obama glances over at Bush' wanker: "My God George W. That is the biggest pecker I've ever seen on a white man. How'd you come by it?"
"Well Barry," answered Bush chuckling. "Heheheh. That's a long story for it wasn't always as large as it is today. However I cannot reveal to you how I got it to such an enormous size for that is a closely held secret."
"Awww c'mon," pleaded Obama. "We're members of the same club. You can tell me."
" I will not do it." Says Bush. "That is not the way I keep secrets."
"I'll give you anything. You just name it." Say's Obama. "Michelle has always ridiculed me about my Caucasian half, as she calls it. I am convinced I do not satisfy her in bed. Look at this, and see if I ain't telling the truth." And he displays his small member.
Bush agrees, "That is truly pi-ti-ful son," and he shakes his head sympathetically. "I tell you what. If you will swear to never, ever tell another living soul, I will share with you how I did it."
'I swear it." Obama says.
"Okay." Bush says. "Each night before I get into bed I perform a ritual. I slam by tally-wacker against the bedpost seventeen times."
"Is that it?" Asked Obama. "That is all I have to do?"
"That's it." Answered Bush. "But don't hold back. Really slam it hard."
That night as Obama was getting into bed, he turned off the light, tiptoed over to the bedpost and began slamming his wanker against it, while keeping count. "Thwack! One...Thwack! Two...Thwack! Three... Thwack! Four... Thwack!"
That's when Michelle sat bolt upright in bed, her sleepy eyes trying to peer through the darkness, hands groping, and she asked in a cautious whisper: "Cheney? Is that you?"