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Penile erection is the result of a complex interaction of psychological, neural, vascular, and endocrine factors, and is often associated with sexual.

So, what exactly is it? An erection — or boner, wood, or chubby, if you prefer — is a hardening of the penis. Most of the time, the penis is.

Once the blood fills the penis and an erection is achieved, the blood vessels to the penis close off so that the erection is maintained. Following sexual.

Or, you may lose the erection during intercourse before you are ready. Erection problems do not usually affect your sex drive.

An erection occurs when a male is sexually aroused, with blood filling the chambers of the penis. Ejaculation is triggered when a sexual act. If you have erectile dysfunction (ED), you and your partner can find exciting new ways to have fun and redefine your sex life.