You decide to rip the journal. If it's so precious to him, maybe you can coax the information on how to reverse the latex transformations!
You hold the journal up to catch the dragon's attention. You notice he looks at you questionably. You grin darkly, and then using your claws, rip it to shreds. Within seconds, all that's left of it are scraps of paper on the floor.
"What. Have. You. DONE?!" The latex dragon screams madly.
Immediatly he charges at you. Although this time, you don't bother to dodge. You put up your arms, and grab him as he charges at you in a rage. Both of you struggle around the room with a lot of squeaking coming from both of your latex bodies rubbing together. In the struggle many things are knocked over, until finally you gain the strength to throw him to the floor. He lands quite painfully on his stomach. Wasting no time, you pin him down and put your arms around his neck and choke him.
The latex dragon squirms and growls but he can't escape your grip. He attempts to use his wings or tail to throw you off, but you use your legs to keep them still. He desperately tries to gasp for air that doesn't come, and after minutes of struggle he goes limp, but is still alive. You pant heavily after the tough ordeal. You figure it would be best to bind him, but seeing as how easily you broke out of your own bonds after being transformed, no doubt he would too. The only thing left was for him to wake up so you could beat the information out of him somehow. Suddenly you look down at the black dragon, and see red eyes filled with hatred staring back.
You quickly get up and throw him to the other side of the room, his body narrowly missing one of the tubes full of goo. There's really only one more thing you can think of that will work. You slowly walk over the crippled black dragon, and he glares at you.
"You'll never find a way to save those transfor-"
You don't let bother to let him finish, as you immediately shove you cock into his face, which knocks him back into a wall. You point to your rubber reptilian cock while scowling darkly. If beating the information out of him won't work, you'll have to do it another way.