in taxon regulates (processual) regulates penile erection regulation of multicellular organismal process regulation of penile erection GO:0060405 Any process that modulates the rate, frequency or extent of penile erection. Penile erection is the hardening, enlarging and rising of the penis which often occurs in the sexually aroused male and enables sexual intercourse. Achieved by increased inflow of blood into the vessels of erectile tissue, and decreased outflow. biological regulation regulation of reproductive process Metazoa