I've wondered if putting a fresh shed skin from one male into a cage with another male would have the effect of making the real snake think a male was in his territory and urge him to more intense mating behavior. Some keepers report that using multiple male boa constrictors yields greater mating success than merely introducing one male to one female.
Are male snakes more aroused for the whole mating event if they think there is competition? Since captive Drys are so powerful, and since the defeated male would not be able to get out of the victor's territory until the keeper took him out of the cage, I don't think it's a good idea to put two males together just to trigger combat. Not to mention that federal regulations for keeping Endangered Species might not support deliberately risking harm to captive specimens of an Endangered Species.
What about introducing a shed skin? Take a shed from your B male and put it in the freezer while it's still fresh and moist. I wonder if you can take it out later during mating season and put it into your A male's cage, and trigger him to think another male was around, without risking actual combat. It may be more effort than necessary but an interesting question.
