As it becomes erect, the penile shaft becomes thicker and longer. The double-layered foreskin provides the skin necessary to accommodate the expanded organ and to allow the penile skin to glide freely, smoothly, and pleasurably over the shaft and glans.
One of
the foreskin's functions is to facilitate a smooth and gentle movement between the mucosal surfaces of the two partners during intercourse
and the foreskin's "gliding action" which is the hallmark mechanical feature of the intact penis provides non-abrasive smooth motion
of the penis in and out of itself between the mucosal surfaces of the vagina or anus facilitating smooth, comfortable, pleasurable
intercourse for both partners.
The foreskin enables the penis to slip in and out of the vagina, anus or mouth non-abrasively inside its own
slick sheath of self-lubricating, movable skin. The partner is thus stimulated by moving pressure rather than by friction only, as
when the male's foreskin is missing, as the shaft of the circumcised penis functions as a leaky piston, drawing vaginal lubricants
out into the drying air and often making artificial lubricants essential for comfortable intercourse. The sexual experience is enhanced
when the foreskin slips back to allow the male's internal organ, the glans, to meet the female's internal organ, the cervix (or prostate
in the case of homosexual anal intercourse). The foreskin fosters intimacy between the two partners by enveloping the glans and maintaining
it as an internal organ.
Thus a circumcised penis without a foreskin will need more friction and stimulation to achieve orgasm and the female or male partner
will be penetrated more forcefully either harder or faster or both. It is in the interests of the men and women who are penetrated
orally, vaginally and anally to be aware that a circumcised penis will need to pound or ‘bang’ their orifices more vigorously for
sensations, whereas an intact penis will glide and slide seamlessly with the foreskin retreating in on itself on the outward motion
and retracting to expose the glans on the inward motion. Less violent thrusting involved surely which does not make sex an ordeal
as it can otherwise be for some people.