???? ????? ?? ??? ??? ?? ??? ???? ??? ??? ??? ?????. ????? ??? ??? ??? ?? ???? ?????, ?? ?? ??? ????. ?? ? ??? ?? ??? ??? ?? ???. ???? ?? ?? ??? ?? ?? ???? ?????. ?? ????? ?????? ?? ??? ??? ???? ??? ??? ????? ?? ?????. ??? ??? ?? ???? ????. ?? ? ??? ? ?? ????? ??, ?? ??, ?? ?? ?? ???. ??

The standard male has four to 8 spontaneous erections every evening though he sleeps. They typically come about in the course of the REM phase, when dreaming is most typical. Nitrates can also be present in some recreational prescription drugs such as amyl nitrate or nitrite ("poppers")