I'm not exactly awash with experience, but the few women I've been with have been more insecure about me going down on them than vice versa.Well, they don't think about it; it's not a rational reaction. Most people aren't even aware of their insecurity, yet it governs most of their interactions with others.I'd think at least half of them wouldn't even put enough thought in to it to think of it that way.Men who won't perform oral sex are just like women who won't perform oral sex-- they're so insecure that they think it's degrading.