Jeff selected the "1950's male teenager" option and pressed ENTER.
Jeff got out of his chair as a window popped up on the computer screen.
"NOW INITIATING LOCATION/TIME CHANGE"
Jeff watched as his room faded away, and was replaced by a bathroom. Jeff's clothes vanished. Jeff looked around at the bathroom. There was a calender on the wall, that read "June 1953." Jeff suddenly felt a tingling throughout his naked body. Jeff watched in the bathroom mirror as his brown hair began to shorten. He stared as it shrunk into a typical 1950's boy's haircut. Then, it turned blond.
Jeff groaned as his back stretched, growing upwards. Jeff watched as his chest muscles gained more definition. His arms and legs thickened as Jeff's body type changed. Jeff's feet cracked as they grew bigger. Jeff's cock grew a bit. Jeff's back muscles bulked up, to support his new, more muscular frame.
Jeff watched as boxers appeared on his waist. Socks popped out of nowhere. Jeff stared as jeans formed out of nothing. Jeff noticed he had a striped T-shirt on, that was tucked into his jeans. His transformation completed, Jeff walked out of the bathroom, realizing he was late for football practice.