Some people may theorize this is because men are so top heavy during teenage years with their hormones and then become less focused on sexual performance with age. The additional benefit of increasing blood flow to the penis is to cause erections that are harder and longer lasting. Some famous basketball players who have used Korean ginseng in excess are also famous for being bald, so don't overdose.

Male enhancement exercises are another technique. 'Jelqing' is a penis stretching exercise stone force  where one strokes and stretches the penis over a long period of time. By forcing blood into the glans (or head) of the penis using just your hands, you steadily 'stretch' the chambers. The traction the mechanism creates encourages cell growth and can permanently increase your size by inches. A good supplement like stone force can help to solve this problem and increase blood flow. If you want to see some numbers, about 30 million men deal with some degree of erectile dysfunction every year.

https://www.hebergementweb.org/threads/100-natural-and-safe-composition-clarisil-pro.555973/
https://forumserigraphie.cplfabbrika.com/presentez-vous-au-forum/36802-100-natural-and-safe-composition-clarisil-pro
http://gestiondelriesgo.gov.co/Foros/yaf_postsm86638_100--Natural-And-Safe-Composition-Clarisil-Pro.aspx#post86638
https://www.mydigoo.com/forums-topicdetail-318822.html
https://www.justaaa.com/topic.php?tid=308375#.YSSLZVvhXSA