The comment about a wife not having yet been rocked by a Cassanova -- some women, including my wife, would laugh at that as an old-fashioned sexist comment, especially in the sense that it implied better physical technique. This kind of talk presumes a ridiculous lack of responsibility on the part of the woman for her own sexuality. If that argument has any validity at all, a man with erectile dysfunction can claim that the problem is that he hasn't yet been blown away by a sufficiently skilled and attractive woman.
Yeah, I'd like to see what happens if a man with ED tries that argument with his wife.