When David went into the shower, he gasps. "Oh my god." He said. "my skin is scaly!"
Indeed.
He saw that his skin was coated in scales, giving him a reptilian man style, yet still keeping A humanish look. The scales mostly retained the skin colour, but with a slight bluish tinge to them. Even his face, hands and feet were scaly too.
He noticed his chest was surprisingly unchanged.
Intuitively, this led him to look at the parts of his bare chest to discover exactly where man met reptile. The transition was surprisingly difficult to find, it was gradiated between several inches. What he saw were scales on one side slowly becoming goose bumps, then a few freckles on human skin.
David didn't know it, but this was the first stage of his monster transformation.
The change was surprisingly weird, But not as weird as when David found that after his shower, His dick had became a little smaller.