Jon stopped next to Karyn's chair and slowly bent forward until (her) lips were just a breadth away from (his), providing a good look down (her) chest simultaneously.
"The problem with these things" Jon said, as (s)he reached down and fondled Karyn's newfound and inexperienced manhood, "is that you can't simply abandon yourself to the feelings". Jon firmly grasped Karyn's shaft and began to slowly stroke it. "It's literally a one-shot deal that without control can be very short lived".
Jon's lips closed the final breathing distance and began passionately kissing the mesmerized Karyn while stroking Karyn faster and harder. When Karyn stopped actively kissing back and just froze, Jon knew what was about to happen and stroked for all (s)he was worth.
Pressing (her) breasts into Karyn's face, Jon whispered into Karyn's ear, "this is so you last longer later when I'm ready to try it".
But it's doubtful Karyn heard this last part as she exploded in a mind numbing orgasm.
"We'll do this right a little later", Jon said as (s)he gave Karyn a quick kiss, and smugly turned on (her) heels and began to slowly saunter away.