Removal of the foreskin dramatically alters the penis's structure and modifies where it derives pleasure.

On the natural penis, nature intended for sexual excitation to take place primarily in the upper penis.

But cutting away tissue from the upper penis (circumcision) devastates the upper penis pleasure zones.

Gone are the many thousands of pleasure receptors of the inner foreskin and its ridged band.

Gone are most or all
 of the thousands of super-erogenous nerves of the frenulum. 

Gone, especially, is
the foreskin's gliding action that alternately uncovers and covers the upper penis nerves, giving them time to rest and recharge so they'll fire off very strong feelings of pleasure. 

 

Rest and Recharge of nerves is very important to sexual excitation.

On the Circumcised Penis during intercourse, instead of a rest period, the nerves of its upper penis get continuous direct stimulation.  Insufficient rest and recharge time causes them to poop out, so the pleasure sensations they fire off are greatly reduced in both quantity and intensity.

Essentially, during intercourse, the upper area of the circumcised penis, which already suffers from a dramatic reduction in sensitivity due to the removal of 20,000-40,000 erogenous nerves, becomes further desensitized due to over-stimulation by constant frictional rubbing (see # 4).

The circ penis finds it can make up for this loss in upper penis pleasure by stimulating its middle & lower area (by pressing the entire penis shaft against the vaginal opening).

To stimulate this longer area, the circumcised penis uses an elongated stroke.

And HERE IS THE KEY POINT: Withdrawing the penis far outside the vagina on the outstroke heightens its pleasure because it allows the middle & lower penis nerves to get a LONGER PERIOD OF REST AND RECHARGE so on subsequent thrusts they fire off strong pleasurable feelings.

In adult videos,
it's common to see circ'd men withdraw the penis far outside the vagina, then PAUSE, before thrusting back in again.  Pausing allows nerves time to rest and recharge, and this heightens sexual feeling on the next in thrust.

But this pausing further reduces the woman's pleasure because it sets up a discordant rhythm.  (See Reason # 8)

The concept that the circumcised penis requires an elongated stroke is easily proven by a simple test:

Women, if your circumcised partner continually thrusts with an elongated stroke, ask him to try to refrain from using it, and instead, use a short thrusting stroke.  He may be able to do this for a little while, but soon, he lapses back into an elongated stroke to derive pleasure and keep his erection.

However, his use of an elongated stroke considerably lessens the woman's pleasure because...

...she needs shorter thrusting strokes so his pubic mound will make frequent rhythmic contact with her clitoris. And she needs this contact at a consistent rhythmic tempo to reach orgasm.

See full explanation at Reasons # 7 & 8.

See, also, Reason #6, which explains why the circ penis uses an elongated stroke to pound and bang sexual nerves in the penis's lower area, because its foreskin is missing.