no sex equals not enough contact

Depending on what you mean by post op time, I doubt that your body will let you do anything that will hurt you. I remember a naturally occurring morning erection while I still had the catheter that was painful. I wouldn't recommend sexual activity during that period. Beyond that, in my experience, it takes a while to reestablish the brain connection to the penis in sexual situations, so I would be a proponent of starting early with sexual stimulation as part of your recovery. Don't be surprised if things that you would have considered "hot" before surgery don't produce the same result as before surgery. It takes time, patience, and practice. With or without an erection, I think it is important to reestablish sexual intimacy with your wife or partner as soon as possible. Although not the ideal everyone strives for, the creativity and intimacy that is part of both partners enjoying sex in the absence of an erection can improve or at least sustain your relationship.

You shouldn't try for an erection with the catheter still in place. Otherwise.... If you can't get one, try to. If you can get one, be very, very happy! As most people on this site will attest, gaining an erection post surgery is like the holy grail of desirable post op indicators of healing.

Don't get upset if you don't get one. Don't fixate on getting one. both of those things can keep you "down". Let your body heal, do what the doc says. Use a vacuum device or pills or a combination of the two. If those don't work try the shots. (don't use the vacuum or pills with the shot) Something will work. Keep the faith.