How does a penis become erect?
Why does the penis get erect?
Why doesn't my penis get erect? Where does the penis go when having sex? When I wake up in the morning daily, my penis is erect and tight. Why does it happens? Does it happen to all the men? What is erection? At what age does the penis stop erecting? Why does the penis become sore after orgasm? What is an erection? Can an erect penis leak sperm? Do girls get turned on when they see an erect penis? Does the fact that my penis gets gets very hard but does not stand up or out straight mean I'm not getting a full erection? What does it mean when a girl grabs your erect penis? Does the foreskin generally retract when the penis becomes erect? Why does my penis lose some of the stiffness after putting on a condom? What is erectile dysfunction? What causes this? Can penis break while it is erect? What is the cause of erectile dysfunction? Does penis oump really work to enlarged the penis? Is it normal that, after a few hours of mastrubation, my erect penis become more engorged and slightly soft to the touch? Do girls get erections? What is the effect of a curved penis on sex? Is it normal for my penis to grow 5 inches when I get erect? Can an erect penis leak sperm before ejaculation? Why and how does a penis shrink? Why is my penis so small? When does the penis cap come out easily during an erection? Does penis size matter during sex? How does it feel to have a big penis? Why does a hard penis give more pleasure than a soft penis inside a vagina? Does penis size really matter during sex? Why does my penis hurt a lot sometimes after I pee?