A pair of newlyweds are out for drinks with a midd

A pair of newlyweds are out for drinks with a middle-aged couple who have been married for twenty years. Having knocked back a few, the older husband turns to the newlyweds and remarks with a wink: "I bet you two are like a couple of rabbits in the bedroom." The newlyweds laugh awkwardly at this, and then the young husband asks "Well, what kind of bedroom animals are you two then?" The older husband screws up his face and thinks about it for a moment, then exclaims wryly: "Don't know about me, but Margaret here would have to be a camel: she can go for weeks and weeks without sex." Without missing a beat, Margaret replies: "That's funny because I was thinking George here would also be a camel: two humps and it's over."