Has anyone else noticed increased mating difficulty?

After nearly 30 years of breeding, I have just about every possible morph of corn snake, royal python and leopard gecko. <br><br>In the last 4-6 years, I have noticed a significant increase in difficulty to achieve successful matings in my snakes. Many just don't want to breed and are becoming picky. <br><br>I have not changed my husbandry and all animals are well fed, healthy and have plenty of fresh water. I am also careful to make sure that everyone is paired up from an early age to increase the chances of success. <br><br>After mentioning this to other breeders, it seems to be a common issue many are facing. I have a few ideas why breeding may be more difficult but I would love to hear what everyone else thinks.