In The Big Lebowski, Maude sends The Dude (or his Dudeness) to the doctor to check his jaw. The doctor asks him to take his pants off, and then he comes out of the exam with a grin on his face (although this could well be his general happiness).
We later learn that she's selected him to be the father of her child, but why did she send him to the doctor? It's implied it's related but if it was so he could be a donor why did she visit him in his apartment?