The deeper I got into transition, the more I found my previous sexuality repulsive and dysphoria-inducing. It was a relief, frankly, to have it slow to a standstill. And yes, this has an impact on relationships, but going through transition is going to, in most cases (not all), result in relationships coming to an end anyways.
All that said, it probably isn't a bad idea to occasionally stimulate those nerves down there, just to keep them active enough so that when you get to the other side it's not as difficult to get the electricity working again.