Wow people, since the advice goes both ways I am just going to have to print this out, make copies, and hand them out to my dates in advance . . . and then Duck!
Somewhat tangential to this topic, a friend of mind has a saying. this applies to women performing oral sex on men:
There are those who won't do it.
There are those that will do it because the love you.
And, there are those that will do it because they love it. These are the ones you cherish and marry.