Revision as of 15:16, 30 June 2012 by Administrator(talk | contribs)(Created page with "The erection of the penis, clitoris or a nipple in their enlarged and firm state. Erections depend on a complex interaction of psychological, neural, vascular and ...")
The erection of the penis, clitoris or a nipple in their enlarged and firm state. Erections depend on a complex interaction of psychological, neural, vascular and endocrine factors.