May thought to the ghost "I want to be older. I heard that a man thinks with his..." he pointed to his dick and said "I don't see why that's so powerful yet so I guess it comes with age.
the ghost said "give me a moment..." May sprouted to 16. his face matured and gained a bit of stubble, his body stretched to the ends of the tub, his body grew some muscles, and his dick also matured and grew to 2 feet long and 1 inch wide.
May felt his hard dick give off so much pleasure and thought "Holy! This is what a guy has to deal with all the time?"
the ghost said "little less intense... and generally a bit smaller, and... it'll be easier to just show you." May's dick unhardened to 1 foot long and stopped giving as much pleasure.
the ghost said "generally like this but smaller until you get excited..."
May asked "Can you do or show me something that may get me excited?"
the ghost thought of something interesting and...