Wilford Decided to improve himself as soon as possible. He was sick of being a sad pathetic loser. He fixed up a batch of his formula to his liking and drank it down. At first, nothing happened but after about a minute he started getting the feeling that every muscle in his body was burning, but for some reason it also felt...erotic. A bulge in his pants beginning to form.
The clothes on his body began to slowly feel tighter as his heart beats faster and sweat begins to pour off his body. His breath becomes heavy as the fat starts melting off his body and is replaced by thin ropey muscle. The looseness in his shirt is short lived as his body begins to bulk up with thickening muscle and he grow slowly taller.
The tightness in his pants isn't helped by a growing arousal from Wilford, this whole process feeling so good. Suddenly there is a ripping sound as his growing body begins to tear out of his conservative clothing. Button by button his shirt pops open as his building biceps tear at his sleeves. His Legs thighs gluts and so forth ripping the pants off of him as well. His hair grows out to shoulder length, but he gains no extra body hair, except for some more pubic hair that is clearly seen as his rock Hard and quickly growing cock forces it's way out of his boxer shorts.
Soon Wilford's body had finished it's change and this now 6 foot 6 inch tall, 350 pound mass of pure muscle and masculinity now stood naked in the Basement he was a fat nerd in a few minutes ago. He looks over himself fascinated that it worked. His hair had grown long and turned from brown to blonde. His body looked incredibly ripped and huge, but what got his attention was his now very obvious 10 inch erection and Billiard balls hanging behind it.
He stared in wonder at his new member and even touched it in disbelief. As his fingers rand along his shaft, he was greeted with new pleasures from his sensitive new member that throbbed with desire and passion. He suddenly found himself leaning against the table and stroking himself with growing intensity until finally his mighty cock blasted forth a long steam of cum in his orgasm. He practically screamed in pleasure with a new deeper manly voice as he was hit by the best feeling of sexual release he ever felt.
"Well," Wilford said out loud to himself, "I think this experiment was a success. I need to run more tests with this body to know for sure." He can't deny it, by "tests" he means he wants to have sex as his new self...or every really. His mind also works double-time with what else he can do with his amazing customizable Drug.