Your wife, she is impregnable?

[pokerfan]

Always loved the wordplay in this joke...

An American man is riding a train in a European country. His seatmate knows some English, and they end up chatting. The seatmate asks if the American has children. The American says no.

"Ah, so sad." The European said.. "Your wife, she is impregnable?"

"Well, um, that's not exactly the word." The American said.

"Oh!" The European interrupted. "I mean, she is inconceivable?"

"Um, not quite --" the American began, only to be interrupted again.

"Oh, no, that isn't right. She is, what is it, she is unbearable?" The European asked.

"Well, actually, that's pretty much sums it up."