Billy watched as Jerome sat stoned out of his mind. he was just about to drink some himself when he noticed the growing bulge outlined in Jerome's shorts.
"Holy shit! That stuff is making me so horny!" The 18 year old said as he started to fumble with his zipper. "Sorry dude, I have to!" With that he had his hard 6 incher out moving his hand up and down it.
Billy thought it looked like fun and was again just about to take a sip when he noticed Jerome's cock was growing and the skin was darkening...