This may cause physical and psychological effects for the affected individual, which could include erectile dysfunction or pain during an erection. Priapism Erect penis erection a painful condition in which the penis does not return to its flaccid state, despite the absence of both physical and psychological stimulation. These tips may also help you to avoid getting an erection in the first place. The decision to try to increase the size of your penis should be made carefully with the consultation of a urologist. As you get older, erections might Erect penis erection longer to develop and might not be as firm.