After enduring effective sexual excitement, young when can erect completely inside a few seconds, spend on a few minutes of ability to erect now, and when just erecting often not quite strong.

• 在经受有效的性刺激后，年轻时几秒钟内就能完全勃起，现在却要花上几分钟才能勃起，而且刚刚勃起时往往不太坚挺。