I agree completely. NEUTER YOUR PETS! My dogs are neutered. My cats are. My snakes are not... but since they're kept one to a cage - no, snakes should NOT be kept in groups! - that's not an issue. Besides, I'm not sure it's possible. My horses are not, because trying to find a vet who will spay a female horse when it's not a medical emergency is impossible.
On another note, I think one of the Muttly chicks that I had pegged as a probable boy confirmed it. While they were out rampaging tonight, he stood in the middle of the run and screamed for a hen, then when he didn't get one he climbed up my leg to crawl under my hand and settled in happily. I've been much more hands-off with these chicks, so they're not as clingy usually as the Seramas are. That's the first time one of them has come to me demanding attention. If it's true that the cockerels tend to be more affectionate and clingy as chicks... that seems like a decent indication!
One of my Serama boys, the blue splash, is getting red patches on his shoulders now. I'm disappointed - before this, he was solid blue splash, and I'd have loved to have him stay that way. But with Seramas, you never know! Especially with eBay eggs. I've also discovered that he has an 'off' button... if I lightly pet the base of his neck, just above the shoulders, his head and neck flop down completely limp and stretched out. It's like it sends him into a trance. None of the others do that.