If you have a erection lasting for more than 4 hours you should contact your physician immediately. Everyones heard that phrase on all the E.D. pill commercials. I know of no one that has had a 4 hour erection before. Unless your fucking for 4 hours. That doesn't count. But has anyone had a 4 hour erection that is unwanted and won't go away? Did you have to call a physician? Can your penis become damaged if it's erect more than 4 hours?