I know that you asked for no female replies but as the Director of Information and Resources for the Reeve Foundation, I thought I could offer some suggestions and comments.
If you could tell us your level of injury, I can better exlain the physiology and give you information specific to your injury level. Also, I want to reassure you that when you are newly injured, things take awhile to return.----this holds true for both men and women.
The Paralysis Resource Center (PRC) has information on sexual function post paralysis. You can find some of our information sheets here:http://www.christopherreeve.org/atf/cf/%7B173bca02-3665-49ab-9378-be009c58a5d3%7D/SEXUALITY%20FOR%20MALES%2012-11%20JPW.PDF
here is also a very good book for men called," Is Fred Dead". It deals with sexual function, changes, relationships, sexuality in a direct and straight forward way. It is an excellent book for couples too. A list of other books can be found at the end of the document that I sent you a link to.
There are a number of sexual tools and toys that can assist both men and women with paralysis. A FertiCare vibrator is used to assist with ejaculation as well as infertility. Many men with paralysis also use penile and testicular rings to aide with erection and ejaculation.
Don't give up hope. I understand your anger and frustration as I have heard it from many individuals over the last 10 years that I have been doing this job. It is normal and healthy just don't let it get in your way.
I am open to providing you with information and resources. You can contact me via private message and or openly in the community. If I better understand your injury, I can try to get other men with paralysis to reply.
I hope you don't mind that I replied, even though you asked for men only. You expressed a common frustration and I wanted to be sure you received a reply.