Some things so horrible even Obama can't take the thought

I Don't Know The Backstory and I'm Content Not To
—Ace

Re the picture of O and Babs Bush, I think they just heard "Bill Clinton jokes about wanting George W Bush to paint him naked,"* which shows there are some things so horrible even Obama can't take the thought.

*link on Drudge to Mail

(CWCD, Mrs Mindful made the connection. I pass it on.)