Ass Play
 

At my age I can no longer get a hard-on. If I take a viagra, I get semi hard. I still enjoy eating my wife's pussy, and she feels bad that I can't cum. I have read many articles about prostrate massage. I want to send her a link to an article, but am not sure how she would react.
She does not like me to play with her ass, but will finger me a little in the shower.

My question is - does masasging the prostrate cause an erection, enough that I can jerk off and cum as she does this.

Ideally, I would love her to take it in her mouth as I cum, or blow it in her face. Does anyone have advice as to positions, etc?

If you are going to do anal play, I highly suggest you give yourself an enema. If she is already leery about anal play, she will not be happy if she runs her finger up your ass and hits a shit log. As far as positions go you will have to find a position you can be in for a little while. I have a friend that is a doctor and has a family practice. He tells me stories about him giving a shot to older men so they can get an erection. For men that can no longer get an erection he gives them a shot directly into the penis. He said he does this several times a week to many different men. He tells me these stories in an enduring way. Not in a making fun of them way. I suggest you talk to your physician about this. He may have this option or maybe a new option.
I cringe when I think of getting a shot in my penis but he said it is not so bad. But still…… Anyway SyFoster is correct. A prostate massage may not give you an erection. But you can still achieve an orgasm from it. A few years ago, my doctor needed a sample of my sperm to see under a microscope. (A longer story not relevant to this conversation) he had me bend over then put his gloved finger up my ass and mashed my prostate hard and sperm came out all in about a three second time period. Ha, Damndest thing. I hope my information helps. Best of luck to you.

1. Ask a doctor, as Kajuk said there may be solutions.

2. If she is reluctant to insert a finger "because it's dirty down there" then she could wear a surgical glove or put a condom on her finger. Obviously wash thoroughly, brush your teeth etc..