You've not replied to anything on your previous post about this, it's pretty much the same issue.

You've been married 45 years, and your wife is having trouble having intercourse - it causes her pain. You've already had some affairs. Are you going to say something to your wife? Or do you think as you said in your previous post that she will not be happy with the idea or to find out? From your other post, I don't think it sounds as if she will happily agree to an open marriage, which just leaves lying.

I think it's up to you to make a choice. Affairs are bad news, they always hurt the other person.. your need for sex seems to be more important than 45 years of a happy marriage, is that fair to say? Please, whatever you do, treat your wife with respect.