May 19
How does erection occur?
Erection of penis begins with sexual stimulation, arousal, impulse, or excitation. Sexual stimulation can be mental (for example: by having sexual fantasies, imaginations, illusions, daydreams, portray in the mind) or tactile (for example: by touch, visual, smell, by touching the penis,). Sexual stimulation makes electrical impulses running through the nerves going to [...]
