ED is the inability of a man to achieve or sustain an erection that allows sexual activity with great penetration. Erectile dysfunction is not a type of disease, but a symptom of some other problem that can be physical, mental or both. Take cenforce softfor treatment of penile failure problems. Don't worry about the occasional failure to get or maintain an erection. Several reasons are involved. This drug has been shown to be more effective if taken sexually stimulated 30 minutes before sexual activity.