I was wondering this myself. I feel ready to try sex, but so far, not even a hint of an erection. I'm only three weeks post-op, so I understand perfectly well that time will likely heal all wounds, but still... I have told my wife on a few occasions that I have a mental erection but I'm ready for the real thing. I haven't yet tried medication because my doctor prescribes only after one month, but even then, I don't know what to expect as I had never had an issue in that area before my surgery.
Sorry for the rmablings, this is all still very new to me...