I'm not generally sexist, but the joke did make me chuckle a little
I have noticed however that there aren't many female producers. Why is this I wonder? I don't like to think it's because music is a male thing, in fact I know it isn't because I can think of two Japanese female musicians that are amazing! Yoko Kano (Ghost in the Shell SAC) and Yuki Kajiura (Noir... not only is that a damn good anime but the music is incredible!), who are really good... and I think they produce too, as well as play most of the instruments!
I just think it would be nice to see more female producers/musicians.