Try to fix both situations

"No, no, no!" You practically yell to yourself. This is not at all what you wanted- first massive breasts, and now you grow a cock! The book is clearly bad news, but you can't bring yourself to abandon it, as it's the only way you can think of to change your body back.

You shuffle through the pages, desperately trying to find one that looks like it would change you back to normal, but the images quickly stop showing human parts altogether, and you know that it can't be correct. When you try to turn back to the front of the book, however, you accidentally rip several of the pages in half, pulling them clean from the weak binding as they scatter across the ground. Moving quickly to pick them up, you look them over in your hands, and realize the tear was clean through the page, separating the image from the incantation. Still, in your haste and limited mental capacity, you decide that you remember the order that the pages separated in, and work to line them up with their images.

You don't even remember what you were doing, but you remember it had something to do with a penis, specifically the one between your legs, pressing against the tight leather of your pants. Eventually you turn to the image of two men with differing cock lengths, and decide this must be the correct page. Sliding an incantation out of the pile you picked up from the floor, you decide it's correct, and start to read the words. "noillats eht eldirbnu"

Intense pain courses through your lower body, forcing you to fall backwards into the grass, the book and its torn pages falling to the ground as well. The pain is coupled with a strong warmth, and it concentrates itself into three distinct locations- your cock, your feet, and your back just above your ass. Even as you watch, your pants start to stretch further as your dick starts to grow, extending outwards and becoming thicker. Its head starts to change shape, the foreskin pulling back from the tip, and it forms the distinct flared head that would sooner belong on a horse.

You hear tearing, and your shoes are ripped to shreds as your feet **** their way out of their confines, also changing shape, but becoming somewhat smaller. A loud crack sounds out and you follow it with a brief cry of pain as your leg bends in on itself, the bone breaking and reforming in a new shape. Your feet taper down into a pair of circular points, and become hooves at the very end.

Similarly, you feel your pants being pushed downwards from behind, as something forces its way out of your back. A long horse tail, brown with white highlights, pushes its way out behind you, propping you up against the grass. It all happens in the space of several seconds, but you feel like it lasted much longer, and when it's finished you simply can't believe what's happened. You've grown a tail, your feet are shaped into hooves, and your cock... your cock is almost eight inches long flaccid, deep brown with white spots, and its flared head is already dripping a steady stream of precum.

At a loss for words, overwhelmed by pain, you simply give up, and the world fades into nothingness as you lose consciousness.