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→Urination functions: Wikify.
The foreskin functions as a hose nozzle during [[urination]]. It confines and consolidates the multiple urine streams from the [[urethra]] into one stream that can easily be controlled and aimed as necessary.
[[Foreskinned]] men advise that [[Urination by foreskinned men| the foreskin should be stretched out to its full length ]] to remove wrinkles before commencing [[urination]].
=== Erection functions ===
When [[erection]] of the [[penis]] occurs, the penis also expands in both circumference and length, so more skin is needed to cover it and allow painless erection. The foreskin unfolds to provide additional skin and permits [[intact]] men to enjoy painless erection, unlike many [[circumcised]] men who experience very tight, painful skin when [[erection]] occurs.