berkeleyj wrote:There are something like 5,000 nerve ending there....
Not to mention variety is the spice of life!

I did find it interesting that he suggests doing the same thing in the same area for so long. I would think many women would "numb out". (Not to mention anticipation is half the fun - where is he going next?)
Back to the toolbox analogy, (tool, box, mm!), I would consider this simply a point of reference. In my experience most women enjoy stimulation of one type or another over pretty much their entire bodies, whether it's during foreplay, afterplay, in-between play, whatever. The key is really just to make whatever you're doing (and her response) be the only thing on your mind so the energy stays focused. Maybe that's the missing piece of that chapter? I can see where 15min in one area could be possible, and even intensely pleasurable, if both partners were very relaxed and clear-minded. Might be a bit much to expect if someone is just trying it out for the first time though.