Sexual dysfunction: “erectile dysfunction” Sexologist Dr Vinod Raina Erectile dysfunction is the inability to produce or sustain an erection that is sufficiently rigid to enable vaginal penetration, and thus functional sexual intercourse. Generally, if this happens regularly (75 percent of the time) for a prolonged period of time (several weeks to months), the term erectile dysfunction shall apply. If this is the case it can also use the word impotence. Erectile dysfunction can take various forms. Some men cannot grow an erection to the full. Some can develop an erection that isn't sufficiently rigid to enable adequate intercourse. There are many causes of erectile dysfunction including certain medications (prescription and non-prescription), psychological factors, and hormone, nerve, or blood vessel disorders that supply the penis. Other male sexual function issues include a lack of Sexual Drive Or Desire (Libido) , ejaculation issues (ejaculatory dysfunction), and...