I already offered to use a diaphragm with him, AnnabelMore. It's rather ridiculous since he must have a zero sperm count (he was tested as such years ago, and he's never gotten his wife pregnant since his vasectomy, and she is younger than I am too). But I'd do it for her comfort. She nixed that because a diaphragm is no protection against diseases. Which I don't HAVE, and my STD testing proves that!
As you can see, this is a little frustrating...