Changes

}}</ref> [[Intact]] males simply use their hand to glide the [[foreskin]] back and forth. It is ''not'' necessary to retract the [[foreskin]] while masturbating. If the foreskin is of adequate length, then the [[intact]] male will usually keep it forward for additional stimulation. Keeping the head covered by the foreskin protects the sensitive mucosa covering the head. The motion of the foreskin stimulates the nerves inside ([[Meissner's corpuscles]]) in the foreskin. Use of lubrication is optional for intact males.