Actually the joke is a headline but let me give you the back story, or perhaps 'front' is a better word for it. It concerns the priapic (ex)Congressman Anthony Weiner who, and here I quote from the New York Post story written by Annie Karni:
tweeted a picture of his bulging crotch to a 21-year-old college student and then falsely claimed his account had been hacked.
Washington, being as stiff-necked as Mr. Weiner is stiff-crotched, insisted that he resign his seat in Congress. Not, of course, that they gave a rat's arse about him sending pictures of his tumescence to young women and then lying about it, but being caught out is unforgivable. So, Mr. Weiner fell on his weapon of choice, so to speak, and decided to spend more time with his family - poor bastards, what have they done to deserve that? Anyway, he has now decided to mount a come back - look, I do the jokes round here! - and may run for mayor of 'Noo Yawk'. That, of course, is the cue for the joke. The NY Post, in the finest Murdoch tradition headed their blog link:
Gotta love those Yanks!