Jacob picked the sexual tab from the window. In this tab, there were all the things you could ever imagine about boy and girl genetalia. All of the parts had check boxes, and a few of them were checked. All of the girl-only parts were unchecked.
Waving the mouse over a few of options, several slider bars appeared underneath them. Finding the penis option, Jacob undid his pants and boxers so that his lower body was unclothed, and slowly moved one of the bars to the left. Immediately, his penis began to lengthen, becoming 6, 7, 8, 9, 10 inches long. Wondering how long it went, Jacob pushed the bar all the way to the left. An explosion of growth followed as his penis grew from a foot long to nearly 10. Feeling that his penis was very disproportionate, he took the second bar and pushed it to the left quickly. Jacob's ten foot long dick quickly ballooned out to almost a foot and a half wide, the width of his waist. Feeling that this was too strange, he slid both bars down so his penis was at a large- 2 feet by 6 inches- but manageable size. There was a third slider labeled sensitivity, it was set near the center. Jacob slid this to the left and soon his penis was so sensitive that simply existing was driving him insane. Resisting the urge to masturbate, he lowered that setting down. The next slider was adjusted fairly to the right. Sliding it to the left, Jacob found it's use immediately. Once the slider was at about 90%, Jacob saw that his piss slit was huge, only a small wall of flesh made up the penis. Jacob lowered it down, just enough that a pencil could easily be put into it. The next slider Jacob adjusted was weight, moving it to the left caused his penis to gain an incredible ammount of weight, so Jacob slid it back down.
Moving on down, the next slider bar Jacob adjusted made his penis head stretch back towards his body. Jacob undid that change. The next bar was all the way to the right, sliding it left caused his penis to sprout many veins.