I use to go to church with a guy who didn't have (a natural) one. As a kid he was injured in an accident and lost it. The doctors were able to create a Chaz Bono replacement. He's seemingly very happily married but no with kids. He and his wife spoke at church once on overcoming challenges. She says they have an active sex-life and she "can hardly tell there's any issue." Of course, he can't sense anything and the accident occurred when he was a young boy so he has never experienced any sexual sensation. I did get the impression he was curious as to what he's missing out on and possibly struggles with resentment toward a relative who caused the accident as it was more a a situation where it was callous horse-playing more than an true accident.