I think the joke may have lost something bearing in mind the language barrier but the Dalai Lama tries to understand the joke

Karl Stefanovic, an Australian newscaster, was given an interview with the Dalai Lama. So he decided to tell the Dalai Lama a Buddhism joke, well why not? It's quite a good joke but I not think easily understandable by someone whose first language is not English and who also may not be a regular pizza eater...

"theoretically possible"

Barack Obama and the Dalai Lama

No Sheeples Here reports that Barack Obama met with the Dalai Lama but didn't want too much publicity as he didn't want to upset his Chinese financiers. Thus this report:

"There was no customary welcome fanfare for this dignitary and the President made no public comments, only issuing a brief statement through his spokesman. The White House banned reporters and TV cameras, distributing a single photo of the two leaders.

However, the White House efforts to keep the meeting on the “down low” weren’t entirely successful. Cameras were able to capture the moment the Dalai Lama was shown the way out through the back door where garbage was piled up outside."

and even more damningly the photo at the top of this post of the Dalai Lama having to leave the White House via a back or side entrance and walk past some trash; that Barack Obama he's got real class hasn't he?