Looking at the blue vial Paul saw the rounded hourglass along with a female symbol. Paul grabbed her left breast and squeezed it a bit and enjoying the sensation thought "Yeah I guess this would be considered female." Then Paul looked at the red vial and noticed the cylinder symbol with the male symbol and curious opened it and dipped her finger into it. Pulling her finger out it was covered in the red solution and she noticed as it grew a bit longer and thicker and hairier. Then looking at her vagina she wanted her dick back so she stuck her red fluid covered finger into her vagina and started fingering herself. She came a couple of times while she made sure she covered the entire inside with the red fluid hoping it would do what she thought it would do. Then a few seconds later she could feel something pushing out of her vagina and a second after saw the head of a penis starting to poke out with a penis hardened by it's formation. After having pushed out 6 inches the balls came out as well the size of peanut shells. Still covered in the red liquid though the penis was still growing.
Paul thought to her... him... themselves? "Well the penis is nice but let's not go overboard... Well let's see what this will do." as Paul went to the tub that was lukewarm. Going in dick first the red liquid interacted with the blue liquid and turned the liquid clear... the whole tub. Her dick wasn't growing any more, her tits weren't shrinking or growing either. Paul was now female everywhere besides the head and genitalia. Paul also had the other vials to test and before forgetting Paul rung out the towel and clothes of excess water and set them to dry. Now came the question of what to test?