I am a male in his 50's, and when I am lying on my back with a full, hard erection, it doesn't stand up vertically like it did when I was younger. It lies flat against my stomach, pointing straight to my navel. It doesn't stand up even when I use v1agra or cialis. Why is that? I don't know exactly when the the change came, but I am sure that it used to stand straight up. It still gets good and hard though.