I agree 100 percent and would like to add that some wives enjoy performing for a husband to let him see that she is capable of satisfying other men with her body and that she is still desired by other men as a lover. As long as a wife has a warm wet pussy, there will always be a man who wants it. Personally, my wife loves sharing because it gives her a variety of men to choose from. And the act of being inseminated by a friend's cock doesn't bother her in the slightest. In fact, she insists on being inseminated to consummate intercourse.