jnimmo: I had considered it after hearing that there is a waiting list a few years ago. My better half isn't OK with it though which answers that.
I asked my partner the other night after seeing this thread. I expected she might have an issue with it. But instead, she laughed and said, "I don't own your balls". Haha!
Surely the donors would have to meet strict medical criteria for health, diseases, inherited problems and the like? Not that I really have any health issues myself, but I still wouldn't consider myself an ideal donor somehow.