 What is the writer's opinion of the instructional videos advertised in the New York Times Book Review?
A recent University of Chicago survey of 10,000 adults found that Americans are having considerably less sex than was generally thought. If that's true, many of us could use a little sexual self-improvement. Deb and I have what seems to us to be a perfectly fine amorous life, yet everywhere I turn the culture tells me--almost mocks me-- you can do better! What would happen to our sex life then, if Deb (who participated in this story because she loves me and because she has tenure) and I tried for the first time to make something happen to it? The idea behind shops like these is to make obtaining the materials of sexual experimentation as ordinary as purchasing plumbing supplies or housewares. Which sort of works--the only sexual thrill I got from the visit was knowing that Microsoft just bought a cock ring. Most of them came in presized sets of three. A woman I know says women's magazines are the best places in America to find sex tips. She's right--go ahead, just try to find a sewing pattern in Redbook . You're much more likely to land on "Try phone sex, dirty notes, porn videos, fantasy games and sex in new places. ... An article in the April Cosmopolitan , "The Six Best Sex Positions," seemed more promising than the Redbook playbook. Each position was accompanied by a succinct write-up and a stick-figure diagram.
 Porn is more instructional.
 They are unrealistic.  The only function of listing these videos was to increase the newspaper's third-quarter sales productivity.  They are overpriced.  Porn is more instructional.