I understand what you are saying Daima, and agree with most of it. And, I used the example of my wife giving me head only to illustrate a point, not because I thought anyone was advocating it. I guess I just didn't explain my point well enough.

Sex, drinking, marijuana use, etc. are adult activities. Educating them about these activities, and being open and honest with them, is definitely the best approach. That doesn't mean you should involve them in these activities, however. I'm sure most of us would agree we wouldn't give a 2yo a shot of Jack Daniels, a bong hit, or intentionally bring them into the bedroom to see mommy and daddy together. The question then, becomes one of where do we draw the line between education and involvement? IMO, bringing them into the headshop while you buy a new pipe or bong dangerously straddles that line.