I don't think this is real. For one, I agree with Cathy that I very much doubt anything like this was ever stated in such an official capacity, especially not in print. Some older female relative may have shared sentiments similar to these with a young woman upon her marriage, but I wouldn't expect anyone to be told anything even close to this explicit in any other context.
For another, the woman in the picture looks as though she is wearing clothing from, at the latest, the 1930s. Maybe the 1940s. Even for someone living in a very rural area, people wouldn't have dressed like that in the 1960s. On top of that, the quality of the picture really is not very good, and by the 1960s (or even the 1950s), the quality of black and white photography was far better than that.
The other thing that strikes me is that the text is just superimposed on a picture of crumpled paper. You can do that in Photoshop, and whoever did this one didn't even do a very good job.
Finally, this is not an "extract" -- it's an excerpt. And if it were legitimate, the title and the author of the book it was from would be listed somewhere on the internet. Google the first sentence in that, and what you get is a bunch of hits to blogs and message boards all posting the same thing...without naming any sort of source beyond "a home economics textbook" or "a sex education textbook"