He's getting younger

The old man is experiencing age regression before your own eyes! Frankenstein unbuttons and tosses his lab coat to the ground.

His messy white hair becomes short and neat as it recedes into his head and turns jet black. The wrinkles all over his body are being removed as they pull themselves and tighten back into healthy looking skin. The bony hands are now younger again, biceps are pumping up to that of a soldier, thighs are increasing in muscular mass, and steel hard abs are taking shape, strengthening those solar plexus.

The doctor tries to walk towards you but it's in vain as he drops to his knees.

"Ugggghhhhh..." He groans before laying down and remaining still in a star shaped pattern.

The transformation isn't over yet. You stare at his cock which previously unlike the rest of his body remained unchanged. As if it's on cue, it now stirs.

It's erecting itself up awkwardly as it twitches to action. Inch by inch it grows, until it stands up straight 10 inches into the air.

The rod continues its abnormal growth by thickening its girth to nearly two inches.

Finally, the professor's mutant manhood pulsates and throbs to life, moving slightly in random directions like an alien tentacle.

You put your hands over your mouth and gasp.

As if it senses a female's presence it now repeatedly twitches south towards you before pointing back up again, beckoning you to come closer.

Taking a quick glance at his face to see if the doctor is alright, you see that he's barely breathing. Definitely still alive. Perhaps a nice sexual release will wake him.

Fearless as you are you slide yourself off the table never taking your eyes off of the cock. You get down on all fours and crawl forward until your head towers over it. Your hair tickles the massive meat.

You'd never expect this to be your first task as an assistant, but nevertheless you were always one to conquer challenges. This one won't deter you one bit.

You take a brief moment to decide on your strategy. You spare the thought of using your virgin holes down below as it just hurts thinking about it. Good thing you have plenty of other weapons at your disposal.