Although many erections are caused by sexual arousal, such as watching a sexy television show or fantasizing, many erections seem to happen for no particular reason.

Although erections occur during sexual excitement or fantasy, they may occur during sleep. Sometimes in adolescents an erection may occur spontaneously without any obvious reason.

Erection Day" is episode 132 in the Comedy Central series South Park. Its original airing date was April 20, 2005. Plot. In this episode, Jimmy faces a dilemma because he begins to ...

The erection of the penis, clitoris or a nipple is its enlarged and firm state. ... Its size may be increased by surgery, although penile enlargement is controversial, and a ...

Likewise, it is impossible to "will" an erection, although sexual thoughts can cause erection. During prolonged foreplay a man's erection may go away; this is normal ...